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8d88c4ca | 1 | /* X86-64 specific support for 64-bit ELF |
ae9a127f | 2 | Copyright 2000, 2001, 2002, 2003 Free Software Foundation, Inc. |
8d88c4ca NC |
3 | Contributed by Jan Hubicka <[email protected]>. |
4 | ||
ae9a127f | 5 | This file is part of BFD, the Binary File Descriptor library. |
8d88c4ca | 6 | |
ae9a127f NC |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
8d88c4ca | 11 | |
ae9a127f NC |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
8d88c4ca | 16 | |
ae9a127f NC |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
8d88c4ca NC |
20 | |
21 | #include "bfd.h" | |
22 | #include "sysdep.h" | |
c434dee6 | 23 | #include "bfdlink.h" |
8d88c4ca NC |
24 | #include "libbfd.h" |
25 | #include "elf-bfd.h" | |
26 | ||
27 | #include "elf/x86-64.h" | |
28 | ||
8d88c4ca NC |
29 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
30 | #define MINUS_ONE (~ (bfd_vma) 0) | |
31 | ||
32 | /* The relocation "howto" table. Order of fields: | |
407443a3 AJ |
33 | type, size, bitsize, pc_relative, complain_on_overflow, |
34 | special_function, name, partial_inplace, src_mask, dst_pack, pcrel_offset. */ | |
70256ad8 AJ |
35 | static reloc_howto_type x86_64_elf_howto_table[] = |
36 | { | |
b34976b6 AM |
37 | HOWTO(R_X86_64_NONE, 0, 0, 0, FALSE, 0, complain_overflow_dont, |
38 | bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000, | |
39 | FALSE), | |
40 | HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
41 | bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE, | |
42 | FALSE), | |
43 | HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
44 | bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff, | |
45 | TRUE), | |
46 | HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
47 | bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff, | |
48 | FALSE), | |
49 | HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
50 | bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff, | |
51 | TRUE), | |
52 | HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
53 | bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff, | |
54 | FALSE), | |
55 | HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
56 | bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE, | |
57 | MINUS_ONE, FALSE), | |
58 | HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
59 | bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE, | |
60 | MINUS_ONE, FALSE), | |
61 | HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
62 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE, | |
63 | MINUS_ONE, FALSE), | |
64 | HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
65 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff, | |
66 | 0xffffffff, TRUE), | |
67 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, | |
68 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
69 | FALSE), | |
70 | HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
71 | bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff, | |
72 | FALSE), | |
73 | HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
74 | bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE), | |
75 | HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield, | |
76 | bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE), | |
77 | HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_signed, | |
78 | bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE), | |
79 | HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
80 | bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE), | |
81 | HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
82 | bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE, | |
83 | MINUS_ONE, FALSE), | |
84 | HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
85 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE, | |
86 | MINUS_ONE, FALSE), | |
87 | HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
88 | bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE, | |
89 | MINUS_ONE, FALSE), | |
90 | HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
91 | bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff, | |
92 | 0xffffffff, TRUE), | |
93 | HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
94 | bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff, | |
95 | 0xffffffff, TRUE), | |
96 | HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
97 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff, | |
98 | 0xffffffff, FALSE), | |
99 | HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
100 | bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff, | |
101 | 0xffffffff, TRUE), | |
102 | HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
103 | bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff, | |
104 | 0xffffffff, FALSE), | |
fe4770f4 AJ |
105 | |
106 | /* GNU extension to record C++ vtable hierarchy. */ | |
b34976b6 AM |
107 | HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
108 | NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE), | |
fe4770f4 AJ |
109 | |
110 | /* GNU extension to record C++ vtable member usage. */ | |
b34976b6 AM |
111 | HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
112 | _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0, | |
113 | FALSE) | |
8d88c4ca NC |
114 | }; |
115 | ||
116 | /* Map BFD relocs to the x86_64 elf relocs. */ | |
70256ad8 AJ |
117 | struct elf_reloc_map |
118 | { | |
8d88c4ca NC |
119 | bfd_reloc_code_real_type bfd_reloc_val; |
120 | unsigned char elf_reloc_val; | |
121 | }; | |
122 | ||
dc810e39 | 123 | static const struct elf_reloc_map x86_64_reloc_map[] = |
8d88c4ca | 124 | { |
70256ad8 AJ |
125 | { BFD_RELOC_NONE, R_X86_64_NONE, }, |
126 | { BFD_RELOC_64, R_X86_64_64, }, | |
127 | { BFD_RELOC_32_PCREL, R_X86_64_PC32, }, | |
128 | { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,}, | |
129 | { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,}, | |
130 | { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, }, | |
131 | { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, }, | |
132 | { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, }, | |
133 | { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, }, | |
134 | { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, }, | |
135 | { BFD_RELOC_32, R_X86_64_32, }, | |
136 | { BFD_RELOC_X86_64_32S, R_X86_64_32S, }, | |
137 | { BFD_RELOC_16, R_X86_64_16, }, | |
138 | { BFD_RELOC_16_PCREL, R_X86_64_PC16, }, | |
139 | { BFD_RELOC_8, R_X86_64_8, }, | |
140 | { BFD_RELOC_8_PCREL, R_X86_64_PC8, }, | |
bffbf940 JJ |
141 | { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, }, |
142 | { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, }, | |
143 | { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, }, | |
144 | { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, }, | |
145 | { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, }, | |
146 | { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, }, | |
147 | { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, }, | |
148 | { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, }, | |
fe4770f4 AJ |
149 | { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, }, |
150 | { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, }, | |
8d88c4ca NC |
151 | }; |
152 | ||
8d88c4ca NC |
153 | |
154 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
155 | static reloc_howto_type * | |
27482721 AJ |
156 | elf64_x86_64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
157 | bfd_reloc_code_real_type code) | |
8d88c4ca NC |
158 | { |
159 | unsigned int i; | |
27482721 | 160 | |
8d88c4ca NC |
161 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); |
162 | i++) | |
163 | { | |
164 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
ffaef159 | 165 | return &x86_64_elf_howto_table[i]; |
8d88c4ca NC |
166 | } |
167 | return 0; | |
168 | } | |
169 | ||
8d88c4ca | 170 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
8da6118f | 171 | |
8d88c4ca | 172 | static void |
27482721 AJ |
173 | elf64_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, |
174 | Elf_Internal_Rela *dst) | |
8d88c4ca | 175 | { |
fe4770f4 | 176 | unsigned r_type, i; |
8d88c4ca NC |
177 | |
178 | r_type = ELF64_R_TYPE (dst->r_info); | |
fe4770f4 AJ |
179 | if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT) |
180 | { | |
bffbf940 | 181 | BFD_ASSERT (r_type <= (unsigned int) R_X86_64_TPOFF32); |
fe4770f4 AJ |
182 | i = r_type; |
183 | } | |
184 | else | |
185 | { | |
186 | BFD_ASSERT (r_type < (unsigned int) R_X86_64_max); | |
bffbf940 | 187 | i = r_type - ((unsigned int) R_X86_64_GNU_VTINHERIT - R_X86_64_TPOFF32 - 1); |
fe4770f4 AJ |
188 | } |
189 | cache_ptr->howto = &x86_64_elf_howto_table[i]; | |
8d88c4ca NC |
190 | BFD_ASSERT (r_type == cache_ptr->howto->type); |
191 | } | |
70256ad8 | 192 | \f |
3bab7989 | 193 | /* Support for core dump NOTE sections. */ |
b34976b6 | 194 | static bfd_boolean |
27482721 | 195 | elf64_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
196 | { |
197 | int offset; | |
198 | size_t raw_size; | |
199 | ||
200 | switch (note->descsz) | |
201 | { | |
202 | default: | |
b34976b6 | 203 | return FALSE; |
3bab7989 ML |
204 | |
205 | case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */ | |
206 | /* pr_cursig */ | |
cedb70c5 | 207 | elf_tdata (abfd)->core_signal |
3bab7989 ML |
208 | = bfd_get_16 (abfd, note->descdata + 12); |
209 | ||
210 | /* pr_pid */ | |
cedb70c5 | 211 | elf_tdata (abfd)->core_pid |
3bab7989 ML |
212 | = bfd_get_32 (abfd, note->descdata + 32); |
213 | ||
214 | /* pr_reg */ | |
215 | offset = 112; | |
216 | raw_size = 216; | |
217 | ||
218 | break; | |
219 | } | |
220 | ||
221 | /* Make a ".reg/999" section. */ | |
222 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
223 | raw_size, note->descpos + offset); | |
224 | } | |
225 | ||
b34976b6 | 226 | static bfd_boolean |
27482721 | 227 | elf64_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
228 | { |
229 | switch (note->descsz) | |
230 | { | |
231 | default: | |
b34976b6 | 232 | return FALSE; |
3bab7989 ML |
233 | |
234 | case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */ | |
235 | elf_tdata (abfd)->core_program | |
236 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); | |
237 | elf_tdata (abfd)->core_command | |
238 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); | |
239 | } | |
240 | ||
241 | /* Note that for some reason, a spurious space is tacked | |
242 | onto the end of the args in some (at least one anyway) | |
243 | implementations, so strip it off if it exists. */ | |
244 | ||
245 | { | |
246 | char *command = elf_tdata (abfd)->core_command; | |
247 | int n = strlen (command); | |
248 | ||
249 | if (0 < n && command[n - 1] == ' ') | |
250 | command[n - 1] = '\0'; | |
251 | } | |
252 | ||
b34976b6 | 253 | return TRUE; |
3bab7989 ML |
254 | } |
255 | \f | |
407443a3 | 256 | /* Functions for the x86-64 ELF linker. */ |
70256ad8 | 257 | |
407443a3 | 258 | /* The name of the dynamic interpreter. This is put in the .interp |
70256ad8 AJ |
259 | section. */ |
260 | ||
407443a3 | 261 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1" |
70256ad8 | 262 | |
d40d037c AJ |
263 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
264 | copying dynamic variables from a shared lib into an app's dynbss | |
265 | section, and instead use a dynamic relocation to point into the | |
266 | shared lib. */ | |
267 | #define ELIMINATE_COPY_RELOCS 1 | |
268 | ||
70256ad8 AJ |
269 | /* The size in bytes of an entry in the global offset table. */ |
270 | ||
271 | #define GOT_ENTRY_SIZE 8 | |
8d88c4ca | 272 | |
70256ad8 | 273 | /* The size in bytes of an entry in the procedure linkage table. */ |
8d88c4ca | 274 | |
70256ad8 AJ |
275 | #define PLT_ENTRY_SIZE 16 |
276 | ||
277 | /* The first entry in a procedure linkage table looks like this. See the | |
278 | SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */ | |
279 | ||
280 | static const bfd_byte elf64_x86_64_plt0_entry[PLT_ENTRY_SIZE] = | |
281 | { | |
653165cc AJ |
282 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
283 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
284 | 0x90, 0x90, 0x90, 0x90 /* pad out to 16 bytes with nops. */ | |
70256ad8 AJ |
285 | }; |
286 | ||
287 | /* Subsequent entries in a procedure linkage table look like this. */ | |
288 | ||
289 | static const bfd_byte elf64_x86_64_plt_entry[PLT_ENTRY_SIZE] = | |
290 | { | |
653165cc | 291 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 292 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 293 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
294 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
295 | 0xe9, /* jmp relative */ | |
296 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
297 | }; | |
298 | ||
299 | /* The x86-64 linker needs to keep track of the number of relocs that | |
985142a4 | 300 | it decides to copy as dynamic relocs in check_relocs for each symbol. |
c434dee6 AJ |
301 | This is so that it can later discard them if they are found to be |
302 | unnecessary. We store the information in a field extending the | |
303 | regular ELF linker hash table. */ | |
70256ad8 | 304 | |
c434dee6 | 305 | struct elf64_x86_64_dyn_relocs |
70256ad8 AJ |
306 | { |
307 | /* Next section. */ | |
c434dee6 AJ |
308 | struct elf64_x86_64_dyn_relocs *next; |
309 | ||
310 | /* The input section of the reloc. */ | |
311 | asection *sec; | |
312 | ||
313 | /* Total number of relocs copied for the input section. */ | |
70256ad8 | 314 | bfd_size_type count; |
c434dee6 AJ |
315 | |
316 | /* Number of pc-relative relocs copied for the input section. */ | |
317 | bfd_size_type pc_count; | |
70256ad8 AJ |
318 | }; |
319 | ||
320 | /* x86-64 ELF linker hash entry. */ | |
321 | ||
322 | struct elf64_x86_64_link_hash_entry | |
323 | { | |
c434dee6 | 324 | struct elf_link_hash_entry elf; |
70256ad8 | 325 | |
c434dee6 AJ |
326 | /* Track dynamic relocs copied for this symbol. */ |
327 | struct elf64_x86_64_dyn_relocs *dyn_relocs; | |
bffbf940 JJ |
328 | |
329 | #define GOT_UNKNOWN 0 | |
330 | #define GOT_NORMAL 1 | |
331 | #define GOT_TLS_GD 2 | |
332 | #define GOT_TLS_IE 3 | |
333 | unsigned char tls_type; | |
334 | }; | |
335 | ||
336 | #define elf64_x86_64_hash_entry(ent) \ | |
337 | ((struct elf64_x86_64_link_hash_entry *)(ent)) | |
338 | ||
339 | struct elf64_x86_64_obj_tdata | |
340 | { | |
341 | struct elf_obj_tdata root; | |
342 | ||
343 | /* tls_type for each local got entry. */ | |
344 | char *local_got_tls_type; | |
70256ad8 AJ |
345 | }; |
346 | ||
bffbf940 JJ |
347 | #define elf64_x86_64_tdata(abfd) \ |
348 | ((struct elf64_x86_64_obj_tdata *) (abfd)->tdata.any) | |
349 | ||
350 | #define elf64_x86_64_local_got_tls_type(abfd) \ | |
351 | (elf64_x86_64_tdata (abfd)->local_got_tls_type) | |
352 | ||
353 | ||
c434dee6 | 354 | /* x86-64 ELF linker hash table. */ |
8d88c4ca | 355 | |
407443a3 AJ |
356 | struct elf64_x86_64_link_hash_table |
357 | { | |
c434dee6 | 358 | struct elf_link_hash_table elf; |
70256ad8 | 359 | |
c434dee6 AJ |
360 | /* Short-cuts to get to dynamic linker sections. */ |
361 | asection *sgot; | |
362 | asection *sgotplt; | |
363 | asection *srelgot; | |
364 | asection *splt; | |
365 | asection *srelplt; | |
366 | asection *sdynbss; | |
367 | asection *srelbss; | |
70256ad8 | 368 | |
bffbf940 JJ |
369 | union { |
370 | bfd_signed_vma refcount; | |
371 | bfd_vma offset; | |
372 | } tls_ld_got; | |
373 | ||
c434dee6 AJ |
374 | /* Small local sym to section mapping cache. */ |
375 | struct sym_sec_cache sym_sec; | |
376 | }; | |
70256ad8 AJ |
377 | |
378 | /* Get the x86-64 ELF linker hash table from a link_info structure. */ | |
8d88c4ca NC |
379 | |
380 | #define elf64_x86_64_hash_table(p) \ | |
381 | ((struct elf64_x86_64_link_hash_table *) ((p)->hash)) | |
382 | ||
407443a3 | 383 | /* Create an entry in an x86-64 ELF linker hash table. */ |
70256ad8 AJ |
384 | |
385 | static struct bfd_hash_entry * | |
27482721 AJ |
386 | link_hash_newfunc (struct bfd_hash_entry *entry, struct bfd_hash_table *table, |
387 | const char *string) | |
70256ad8 | 388 | { |
70256ad8 | 389 | /* Allocate the structure if it has not already been allocated by a |
c434dee6 AJ |
390 | subclass. */ |
391 | if (entry == NULL) | |
392 | { | |
393 | entry = bfd_hash_allocate (table, | |
394 | sizeof (struct elf64_x86_64_link_hash_entry)); | |
395 | if (entry == NULL) | |
396 | return entry; | |
397 | } | |
70256ad8 AJ |
398 | |
399 | /* Call the allocation method of the superclass. */ | |
c434dee6 AJ |
400 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
401 | if (entry != NULL) | |
70256ad8 | 402 | { |
c434dee6 AJ |
403 | struct elf64_x86_64_link_hash_entry *eh; |
404 | ||
405 | eh = (struct elf64_x86_64_link_hash_entry *) entry; | |
406 | eh->dyn_relocs = NULL; | |
bffbf940 | 407 | eh->tls_type = GOT_UNKNOWN; |
70256ad8 AJ |
408 | } |
409 | ||
c434dee6 | 410 | return entry; |
70256ad8 AJ |
411 | } |
412 | ||
8d88c4ca NC |
413 | /* Create an X86-64 ELF linker hash table. */ |
414 | ||
415 | static struct bfd_link_hash_table * | |
27482721 | 416 | elf64_x86_64_link_hash_table_create (bfd *abfd) |
8d88c4ca NC |
417 | { |
418 | struct elf64_x86_64_link_hash_table *ret; | |
dc810e39 | 419 | bfd_size_type amt = sizeof (struct elf64_x86_64_link_hash_table); |
8d88c4ca | 420 | |
e2d34d7d | 421 | ret = (struct elf64_x86_64_link_hash_table *) bfd_malloc (amt); |
c434dee6 | 422 | if (ret == NULL) |
8d88c4ca NC |
423 | return NULL; |
424 | ||
c434dee6 | 425 | if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc)) |
8d88c4ca | 426 | { |
e2d34d7d | 427 | free (ret); |
8d88c4ca NC |
428 | return NULL; |
429 | } | |
430 | ||
c434dee6 AJ |
431 | ret->sgot = NULL; |
432 | ret->sgotplt = NULL; | |
433 | ret->srelgot = NULL; | |
434 | ret->splt = NULL; | |
435 | ret->srelplt = NULL; | |
436 | ret->sdynbss = NULL; | |
437 | ret->srelbss = NULL; | |
438 | ret->sym_sec.abfd = NULL; | |
bffbf940 | 439 | ret->tls_ld_got.refcount = 0; |
c434dee6 AJ |
440 | |
441 | return &ret->elf.root; | |
442 | } | |
443 | ||
444 | /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up | |
445 | shortcuts to them in our hash table. */ | |
446 | ||
b34976b6 | 447 | static bfd_boolean |
27482721 | 448 | create_got_section (bfd *dynobj, struct bfd_link_info *info) |
c434dee6 AJ |
449 | { |
450 | struct elf64_x86_64_link_hash_table *htab; | |
451 | ||
452 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
b34976b6 | 453 | return FALSE; |
c434dee6 AJ |
454 | |
455 | htab = elf64_x86_64_hash_table (info); | |
456 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); | |
457 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
458 | if (!htab->sgot || !htab->sgotplt) | |
459 | abort (); | |
460 | ||
461 | htab->srelgot = bfd_make_section (dynobj, ".rela.got"); | |
462 | if (htab->srelgot == NULL | |
463 | || ! bfd_set_section_flags (dynobj, htab->srelgot, | |
464 | (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | |
465 | | SEC_IN_MEMORY | SEC_LINKER_CREATED | |
466 | | SEC_READONLY)) | |
467 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3)) | |
b34976b6 AM |
468 | return FALSE; |
469 | return TRUE; | |
c434dee6 AJ |
470 | } |
471 | ||
472 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and | |
473 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
474 | hash table. */ | |
475 | ||
b34976b6 | 476 | static bfd_boolean |
27482721 | 477 | elf64_x86_64_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
c434dee6 AJ |
478 | { |
479 | struct elf64_x86_64_link_hash_table *htab; | |
480 | ||
481 | htab = elf64_x86_64_hash_table (info); | |
482 | if (!htab->sgot && !create_got_section (dynobj, info)) | |
b34976b6 | 483 | return FALSE; |
c434dee6 AJ |
484 | |
485 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
b34976b6 | 486 | return FALSE; |
c434dee6 AJ |
487 | |
488 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); | |
489 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
490 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); | |
491 | if (!info->shared) | |
492 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
493 | ||
494 | if (!htab->splt || !htab->srelplt || !htab->sdynbss | |
495 | || (!info->shared && !htab->srelbss)) | |
496 | abort (); | |
497 | ||
b34976b6 | 498 | return TRUE; |
c434dee6 AJ |
499 | } |
500 | ||
501 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
502 | ||
503 | static void | |
9c5bfbb7 | 504 | elf64_x86_64_copy_indirect_symbol (const struct elf_backend_data *bed, |
27482721 AJ |
505 | struct elf_link_hash_entry *dir, |
506 | struct elf_link_hash_entry *ind) | |
c434dee6 AJ |
507 | { |
508 | struct elf64_x86_64_link_hash_entry *edir, *eind; | |
509 | ||
510 | edir = (struct elf64_x86_64_link_hash_entry *) dir; | |
511 | eind = (struct elf64_x86_64_link_hash_entry *) ind; | |
512 | ||
513 | if (eind->dyn_relocs != NULL) | |
514 | { | |
515 | if (edir->dyn_relocs != NULL) | |
516 | { | |
517 | struct elf64_x86_64_dyn_relocs **pp; | |
518 | struct elf64_x86_64_dyn_relocs *p; | |
519 | ||
520 | if (ind->root.type == bfd_link_hash_indirect) | |
521 | abort (); | |
522 | ||
523 | /* Add reloc counts against the weak sym to the strong sym | |
524 | list. Merge any entries against the same section. */ | |
525 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
526 | { | |
527 | struct elf64_x86_64_dyn_relocs *q; | |
528 | ||
529 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
530 | if (q->sec == p->sec) | |
531 | { | |
532 | q->pc_count += p->pc_count; | |
533 | q->count += p->count; | |
534 | *pp = p->next; | |
535 | break; | |
536 | } | |
537 | if (q == NULL) | |
538 | pp = &p->next; | |
539 | } | |
540 | *pp = edir->dyn_relocs; | |
541 | } | |
542 | ||
543 | edir->dyn_relocs = eind->dyn_relocs; | |
544 | eind->dyn_relocs = NULL; | |
545 | } | |
546 | ||
bffbf940 JJ |
547 | if (ind->root.type == bfd_link_hash_indirect |
548 | && dir->got.refcount <= 0) | |
549 | { | |
550 | edir->tls_type = eind->tls_type; | |
551 | eind->tls_type = GOT_UNKNOWN; | |
552 | } | |
553 | ||
d40d037c AJ |
554 | if (ELIMINATE_COPY_RELOCS |
555 | && ind->root.type != bfd_link_hash_indirect | |
556 | && (dir->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0) | |
557 | /* If called to transfer flags for a weakdef during processing | |
558 | of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF. | |
559 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
560 | dir->elf_link_hash_flags |= | |
561 | (ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC | |
562 | | ELF_LINK_HASH_REF_REGULAR | |
563 | | ELF_LINK_HASH_REF_REGULAR_NONWEAK)); | |
564 | else | |
565 | _bfd_elf_link_hash_copy_indirect (bed, dir, ind); | |
8d88c4ca NC |
566 | } |
567 | ||
b34976b6 | 568 | static bfd_boolean |
27482721 | 569 | elf64_x86_64_mkobject (bfd *abfd) |
8d88c4ca | 570 | { |
bffbf940 JJ |
571 | bfd_size_type amt = sizeof (struct elf64_x86_64_obj_tdata); |
572 | abfd->tdata.any = bfd_zalloc (abfd, amt); | |
573 | if (abfd->tdata.any == NULL) | |
b34976b6 AM |
574 | return FALSE; |
575 | return TRUE; | |
bffbf940 JJ |
576 | } |
577 | ||
b34976b6 | 578 | static bfd_boolean |
27482721 | 579 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 JJ |
580 | { |
581 | /* Allocate our special target data. */ | |
582 | struct elf64_x86_64_obj_tdata *new_tdata; | |
583 | bfd_size_type amt = sizeof (struct elf64_x86_64_obj_tdata); | |
584 | new_tdata = bfd_zalloc (abfd, amt); | |
585 | if (new_tdata == NULL) | |
b34976b6 | 586 | return FALSE; |
bffbf940 JJ |
587 | new_tdata->root = *abfd->tdata.elf_obj_data; |
588 | abfd->tdata.any = new_tdata; | |
8d88c4ca NC |
589 | /* Set the right machine number for an x86-64 elf64 file. */ |
590 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 591 | return TRUE; |
8d88c4ca NC |
592 | } |
593 | ||
bffbf940 | 594 | static int |
27482721 | 595 | elf64_x86_64_tls_transition (struct bfd_link_info *info, int r_type, int is_local) |
bffbf940 JJ |
596 | { |
597 | if (info->shared) | |
598 | return r_type; | |
599 | ||
600 | switch (r_type) | |
601 | { | |
602 | case R_X86_64_TLSGD: | |
603 | case R_X86_64_GOTTPOFF: | |
604 | if (is_local) | |
605 | return R_X86_64_TPOFF32; | |
606 | return R_X86_64_GOTTPOFF; | |
607 | case R_X86_64_TLSLD: | |
608 | return R_X86_64_TPOFF32; | |
609 | } | |
610 | ||
611 | return r_type; | |
612 | } | |
613 | ||
70256ad8 | 614 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
615 | calculate needed space in the global offset table, procedure |
616 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 617 | |
b34976b6 | 618 | static bfd_boolean |
27482721 AJ |
619 | elf64_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec, |
620 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 621 | { |
c434dee6 | 622 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
623 | Elf_Internal_Shdr *symtab_hdr; |
624 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
625 | const Elf_Internal_Rela *rel; |
626 | const Elf_Internal_Rela *rel_end; | |
70256ad8 AJ |
627 | asection *sreloc; |
628 | ||
1049f94e | 629 | if (info->relocatable) |
b34976b6 | 630 | return TRUE; |
70256ad8 | 631 | |
c434dee6 | 632 | htab = elf64_x86_64_hash_table (info); |
70256ad8 AJ |
633 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
634 | sym_hashes = elf_sym_hashes (abfd); | |
70256ad8 | 635 | |
c434dee6 AJ |
636 | sreloc = NULL; |
637 | ||
70256ad8 AJ |
638 | rel_end = relocs + sec->reloc_count; |
639 | for (rel = relocs; rel < rel_end; rel++) | |
640 | { | |
bffbf940 | 641 | unsigned int r_type; |
70256ad8 AJ |
642 | unsigned long r_symndx; |
643 | struct elf_link_hash_entry *h; | |
644 | ||
645 | r_symndx = ELF64_R_SYM (rel->r_info); | |
bffbf940 | 646 | r_type = ELF64_R_TYPE (rel->r_info); |
c434dee6 AJ |
647 | |
648 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
649 | { | |
650 | (*_bfd_error_handler) (_("%s: bad symbol index: %d"), | |
651 | bfd_archive_filename (abfd), | |
652 | r_symndx); | |
b34976b6 | 653 | return FALSE; |
c434dee6 AJ |
654 | } |
655 | ||
70256ad8 AJ |
656 | if (r_symndx < symtab_hdr->sh_info) |
657 | h = NULL; | |
658 | else | |
659 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
660 | ||
bffbf940 JJ |
661 | r_type = elf64_x86_64_tls_transition (info, r_type, h == NULL); |
662 | switch (r_type) | |
70256ad8 | 663 | { |
bffbf940 JJ |
664 | case R_X86_64_TLSLD: |
665 | htab->tls_ld_got.refcount += 1; | |
666 | goto create_got; | |
667 | ||
668 | case R_X86_64_TPOFF32: | |
669 | if (info->shared) | |
70256ad8 | 670 | { |
bffbf940 JJ |
671 | (*_bfd_error_handler) |
672 | (_("%s: relocation %s can not be used when making a shared object; recompile with -fPIC"), | |
673 | bfd_archive_filename (abfd), | |
674 | x86_64_elf_howto_table[r_type].name); | |
675 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 676 | return FALSE; |
70256ad8 | 677 | } |
bffbf940 | 678 | break; |
c434dee6 | 679 | |
bffbf940 JJ |
680 | case R_X86_64_GOTTPOFF: |
681 | if (info->shared) | |
682 | info->flags |= DF_STATIC_TLS; | |
683 | /* Fall through */ | |
70256ad8 | 684 | |
bffbf940 JJ |
685 | case R_X86_64_GOT32: |
686 | case R_X86_64_GOTPCREL: | |
687 | case R_X86_64_TLSGD: | |
688 | /* This symbol requires a global offset table entry. */ | |
689 | { | |
690 | int tls_type, old_tls_type; | |
691 | ||
692 | switch (r_type) | |
693 | { | |
694 | default: tls_type = GOT_NORMAL; break; | |
695 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
696 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
697 | } | |
698 | ||
699 | if (h != NULL) | |
700 | { | |
701 | h->got.refcount += 1; | |
702 | old_tls_type = elf64_x86_64_hash_entry (h)->tls_type; | |
703 | } | |
704 | else | |
705 | { | |
706 | bfd_signed_vma *local_got_refcounts; | |
707 | ||
708 | /* This is a global offset table entry for a local symbol. */ | |
709 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
710 | if (local_got_refcounts == NULL) | |
711 | { | |
712 | bfd_size_type size; | |
713 | ||
714 | size = symtab_hdr->sh_info; | |
715 | size *= sizeof (bfd_signed_vma) + sizeof (char); | |
716 | local_got_refcounts = ((bfd_signed_vma *) | |
717 | bfd_zalloc (abfd, size)); | |
718 | if (local_got_refcounts == NULL) | |
b34976b6 | 719 | return FALSE; |
bffbf940 JJ |
720 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
721 | elf64_x86_64_local_got_tls_type (abfd) | |
722 | = (char *) (local_got_refcounts + symtab_hdr->sh_info); | |
723 | } | |
724 | local_got_refcounts[r_symndx] += 1; | |
725 | old_tls_type | |
726 | = elf64_x86_64_local_got_tls_type (abfd) [r_symndx]; | |
727 | } | |
728 | ||
729 | /* If a TLS symbol is accessed using IE at least once, | |
730 | there is no point to use dynamic model for it. */ | |
731 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
732 | && (old_tls_type != GOT_TLS_GD || tls_type != GOT_TLS_IE)) | |
733 | { | |
734 | if (old_tls_type == GOT_TLS_IE && tls_type == GOT_TLS_GD) | |
735 | tls_type = old_tls_type; | |
736 | else | |
737 | { | |
738 | (*_bfd_error_handler) | |
739 | (_("%s: %s' accessed both as normal and thread local symbol"), | |
740 | bfd_archive_filename (abfd), | |
741 | h ? h->root.root.string : "<local>"); | |
b34976b6 | 742 | return FALSE; |
bffbf940 JJ |
743 | } |
744 | } | |
745 | ||
746 | if (old_tls_type != tls_type) | |
747 | { | |
748 | if (h != NULL) | |
749 | elf64_x86_64_hash_entry (h)->tls_type = tls_type; | |
750 | else | |
751 | elf64_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
752 | } | |
753 | } | |
c434dee6 AJ |
754 | /* Fall through */ |
755 | ||
756 | //case R_X86_64_GOTPCREL: | |
bffbf940 | 757 | create_got: |
c434dee6 AJ |
758 | if (htab->sgot == NULL) |
759 | { | |
760 | if (htab->elf.dynobj == NULL) | |
761 | htab->elf.dynobj = abfd; | |
762 | if (!create_got_section (htab->elf.dynobj, info)) | |
b34976b6 | 763 | return FALSE; |
c434dee6 | 764 | } |
70256ad8 AJ |
765 | break; |
766 | ||
767 | case R_X86_64_PLT32: | |
768 | /* This symbol requires a procedure linkage table entry. We | |
407443a3 AJ |
769 | actually build the entry in adjust_dynamic_symbol, |
770 | because this might be a case of linking PIC code which is | |
771 | never referenced by a dynamic object, in which case we | |
772 | don't need to generate a procedure linkage table entry | |
773 | after all. */ | |
70256ad8 AJ |
774 | |
775 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 776 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
777 | if (h == NULL) |
778 | continue; | |
779 | ||
cc78d0af | 780 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
51b64d56 | 781 | h->plt.refcount += 1; |
70256ad8 AJ |
782 | break; |
783 | ||
cc78d0af AJ |
784 | case R_X86_64_8: |
785 | case R_X86_64_16: | |
70256ad8 AJ |
786 | case R_X86_64_32: |
787 | case R_X86_64_32S: | |
1b71fb54 AJ |
788 | /* Let's help debug shared library creation. These relocs |
789 | cannot be used in shared libs. Don't error out for | |
790 | sections we don't care about, such as debug sections or | |
791 | non-constant sections. */ | |
792 | if (info->shared | |
793 | && (sec->flags & SEC_ALLOC) != 0 | |
794 | && (sec->flags & SEC_READONLY) != 0) | |
795 | { | |
796 | (*_bfd_error_handler) | |
797 | (_("%s: relocation %s can not be used when making a shared object; recompile with -fPIC"), | |
798 | bfd_archive_filename (abfd), | |
bffbf940 | 799 | x86_64_elf_howto_table[r_type].name); |
1b71fb54 | 800 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 801 | return FALSE; |
1b71fb54 AJ |
802 | } |
803 | /* Fall through. */ | |
804 | ||
c434dee6 AJ |
805 | case R_X86_64_PC8: |
806 | case R_X86_64_PC16: | |
70256ad8 | 807 | case R_X86_64_PC32: |
1b71fb54 | 808 | case R_X86_64_64: |
c434dee6 AJ |
809 | if (h != NULL && !info->shared) |
810 | { | |
811 | /* If this reloc is in a read-only section, we might | |
812 | need a copy reloc. We can't check reliably at this | |
813 | stage whether the section is read-only, as input | |
814 | sections have not yet been mapped to output sections. | |
815 | Tentatively set the flag for now, and correct in | |
816 | adjust_dynamic_symbol. */ | |
817 | h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; | |
818 | ||
819 | /* We may need a .plt entry if the function this reloc | |
820 | refers to is in a shared lib. */ | |
821 | h->plt.refcount += 1; | |
822 | } | |
70256ad8 AJ |
823 | |
824 | /* If we are creating a shared library, and this is a reloc | |
825 | against a global symbol, or a non PC relative reloc | |
826 | against a local symbol, then we need to copy the reloc | |
827 | into the shared library. However, if we are linking with | |
828 | -Bsymbolic, we do not need to copy a reloc against a | |
829 | global symbol which is defined in an object we are | |
407443a3 | 830 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
831 | this point we have not seen all the input files, so it is |
832 | possible that DEF_REGULAR is not set now but will be set | |
c434dee6 AJ |
833 | later (it is never cleared). In case of a weak definition, |
834 | DEF_REGULAR may be cleared later by a strong definition in | |
835 | a shared library. We account for that possibility below by | |
836 | storing information in the relocs_copied field of the hash | |
837 | table entry. A similar situation occurs when creating | |
838 | shared libraries and symbol visibility changes render the | |
839 | symbol local. | |
840 | ||
841 | If on the other hand, we are creating an executable, we | |
842 | may need to keep relocations for symbols satisfied by a | |
843 | dynamic library if we manage to avoid copy relocs for the | |
844 | symbol. */ | |
845 | if ((info->shared | |
846 | && (sec->flags & SEC_ALLOC) != 0 | |
bffbf940 JJ |
847 | && (((r_type != R_X86_64_PC8) |
848 | && (r_type != R_X86_64_PC16) | |
849 | && (r_type != R_X86_64_PC32)) | |
c434dee6 AJ |
850 | || (h != NULL |
851 | && (! info->symbolic | |
852 | || h->root.type == bfd_link_hash_defweak | |
853 | || (h->elf_link_hash_flags | |
854 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
d40d037c AJ |
855 | || (ELIMINATE_COPY_RELOCS |
856 | && !info->shared | |
c434dee6 AJ |
857 | && (sec->flags & SEC_ALLOC) != 0 |
858 | && h != NULL | |
859 | && (h->root.type == bfd_link_hash_defweak | |
860 | || (h->elf_link_hash_flags | |
861 | & ELF_LINK_HASH_DEF_REGULAR) == 0))) | |
70256ad8 | 862 | { |
c434dee6 AJ |
863 | struct elf64_x86_64_dyn_relocs *p; |
864 | struct elf64_x86_64_dyn_relocs **head; | |
865 | ||
866 | /* We must copy these reloc types into the output file. | |
867 | Create a reloc section in dynobj and make room for | |
868 | this reloc. */ | |
70256ad8 AJ |
869 | if (sreloc == NULL) |
870 | { | |
871 | const char *name; | |
c434dee6 | 872 | bfd *dynobj; |
70256ad8 AJ |
873 | |
874 | name = (bfd_elf_string_from_elf_section | |
875 | (abfd, | |
876 | elf_elfheader (abfd)->e_shstrndx, | |
877 | elf_section_data (sec)->rel_hdr.sh_name)); | |
878 | if (name == NULL) | |
b34976b6 | 879 | return FALSE; |
70256ad8 | 880 | |
c434dee6 AJ |
881 | if (strncmp (name, ".rela", 5) != 0 |
882 | || strcmp (bfd_get_section_name (abfd, sec), | |
883 | name + 5) != 0) | |
884 | { | |
885 | (*_bfd_error_handler) | |
886 | (_("%s: bad relocation section name `%s\'"), | |
887 | bfd_archive_filename (abfd), name); | |
888 | } | |
889 | ||
890 | if (htab->elf.dynobj == NULL) | |
891 | htab->elf.dynobj = abfd; | |
892 | ||
893 | dynobj = htab->elf.dynobj; | |
70256ad8 AJ |
894 | |
895 | sreloc = bfd_get_section_by_name (dynobj, name); | |
896 | if (sreloc == NULL) | |
897 | { | |
898 | flagword flags; | |
899 | ||
900 | sreloc = bfd_make_section (dynobj, name); | |
901 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | |
902 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
903 | if ((sec->flags & SEC_ALLOC) != 0) | |
904 | flags |= SEC_ALLOC | SEC_LOAD; | |
905 | if (sreloc == NULL | |
906 | || ! bfd_set_section_flags (dynobj, sreloc, flags) | |
cc78d0af | 907 | || ! bfd_set_section_alignment (dynobj, sreloc, 3)) |
b34976b6 | 908 | return FALSE; |
70256ad8 | 909 | } |
c434dee6 | 910 | elf_section_data (sec)->sreloc = sreloc; |
70256ad8 AJ |
911 | } |
912 | ||
c434dee6 AJ |
913 | /* If this is a global symbol, we count the number of |
914 | relocations we need for this symbol. */ | |
915 | if (h != NULL) | |
70256ad8 | 916 | { |
c434dee6 AJ |
917 | head = &((struct elf64_x86_64_link_hash_entry *) h)->dyn_relocs; |
918 | } | |
919 | else | |
920 | { | |
921 | /* Track dynamic relocs needed for local syms too. | |
922 | We really need local syms available to do this | |
923 | easily. Oh well. */ | |
924 | ||
925 | asection *s; | |
926 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, | |
927 | sec, r_symndx); | |
928 | if (s == NULL) | |
b34976b6 | 929 | return FALSE; |
70256ad8 | 930 | |
c434dee6 AJ |
931 | head = ((struct elf64_x86_64_dyn_relocs **) |
932 | &elf_section_data (s)->local_dynrel); | |
933 | } | |
70256ad8 | 934 | |
c434dee6 AJ |
935 | p = *head; |
936 | if (p == NULL || p->sec != sec) | |
937 | { | |
938 | bfd_size_type amt = sizeof *p; | |
939 | p = ((struct elf64_x86_64_dyn_relocs *) | |
940 | bfd_alloc (htab->elf.dynobj, amt)); | |
70256ad8 | 941 | if (p == NULL) |
b34976b6 | 942 | return FALSE; |
c434dee6 AJ |
943 | p->next = *head; |
944 | *head = p; | |
945 | p->sec = sec; | |
946 | p->count = 0; | |
947 | p->pc_count = 0; | |
70256ad8 | 948 | } |
c434dee6 AJ |
949 | |
950 | p->count += 1; | |
bffbf940 JJ |
951 | if (r_type == R_X86_64_PC8 |
952 | || r_type == R_X86_64_PC16 | |
953 | || r_type == R_X86_64_PC32) | |
c434dee6 | 954 | p->pc_count += 1; |
70256ad8 AJ |
955 | } |
956 | break; | |
fe4770f4 AJ |
957 | |
958 | /* This relocation describes the C++ object vtable hierarchy. | |
959 | Reconstruct it for later use during GC. */ | |
960 | case R_X86_64_GNU_VTINHERIT: | |
961 | if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
b34976b6 | 962 | return FALSE; |
fe4770f4 AJ |
963 | break; |
964 | ||
965 | /* This relocation describes which C++ vtable entries are actually | |
966 | used. Record for later use during GC. */ | |
967 | case R_X86_64_GNU_VTENTRY: | |
cc78d0af | 968 | if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
b34976b6 | 969 | return FALSE; |
fe4770f4 | 970 | break; |
c434dee6 AJ |
971 | |
972 | default: | |
973 | break; | |
70256ad8 AJ |
974 | } |
975 | } | |
976 | ||
b34976b6 | 977 | return TRUE; |
70256ad8 AJ |
978 | } |
979 | ||
980 | /* Return the section that should be marked against GC for a given | |
407443a3 | 981 | relocation. */ |
70256ad8 AJ |
982 | |
983 | static asection * | |
27482721 AJ |
984 | elf64_x86_64_gc_mark_hook (asection *sec, |
985 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
986 | Elf_Internal_Rela *rel, | |
987 | struct elf_link_hash_entry *h, | |
988 | Elf_Internal_Sym *sym) | |
70256ad8 AJ |
989 | { |
990 | if (h != NULL) | |
991 | { | |
fe4770f4 | 992 | switch (ELF64_R_TYPE (rel->r_info)) |
70256ad8 | 993 | { |
fe4770f4 AJ |
994 | case R_X86_64_GNU_VTINHERIT: |
995 | case R_X86_64_GNU_VTENTRY: | |
996 | break; | |
70256ad8 AJ |
997 | |
998 | default: | |
fe4770f4 AJ |
999 | switch (h->root.type) |
1000 | { | |
1001 | case bfd_link_hash_defined: | |
1002 | case bfd_link_hash_defweak: | |
1003 | return h->root.u.def.section; | |
1004 | ||
1005 | case bfd_link_hash_common: | |
1006 | return h->root.u.c.p->section; | |
1007 | ||
1008 | default: | |
1009 | break; | |
1010 | } | |
70256ad8 AJ |
1011 | } |
1012 | } | |
1013 | else | |
1e2f5b6e | 1014 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
70256ad8 AJ |
1015 | |
1016 | return NULL; | |
1017 | } | |
1018 | ||
407443a3 | 1019 | /* Update the got entry reference counts for the section being removed. */ |
70256ad8 | 1020 | |
b34976b6 | 1021 | static bfd_boolean |
27482721 AJ |
1022 | elf64_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, |
1023 | asection *sec, const Elf_Internal_Rela *relocs) | |
70256ad8 AJ |
1024 | { |
1025 | Elf_Internal_Shdr *symtab_hdr; | |
1026 | struct elf_link_hash_entry **sym_hashes; | |
1027 | bfd_signed_vma *local_got_refcounts; | |
1028 | const Elf_Internal_Rela *rel, *relend; | |
c434dee6 AJ |
1029 | |
1030 | elf_section_data (sec)->local_dynrel = NULL; | |
70256ad8 AJ |
1031 | |
1032 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1033 | sym_hashes = elf_sym_hashes (abfd); | |
1034 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1035 | ||
70256ad8 AJ |
1036 | relend = relocs + sec->reloc_count; |
1037 | for (rel = relocs; rel < relend; rel++) | |
26e41594 AM |
1038 | { |
1039 | unsigned long r_symndx; | |
1040 | unsigned int r_type; | |
1041 | struct elf_link_hash_entry *h = NULL; | |
70256ad8 | 1042 | |
26e41594 AM |
1043 | r_symndx = ELF64_R_SYM (rel->r_info); |
1044 | if (r_symndx >= symtab_hdr->sh_info) | |
1045 | { | |
1046 | struct elf64_x86_64_link_hash_entry *eh; | |
1047 | struct elf64_x86_64_dyn_relocs **pp; | |
1048 | struct elf64_x86_64_dyn_relocs *p; | |
c434dee6 | 1049 | |
26e41594 AM |
1050 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1051 | eh = (struct elf64_x86_64_link_hash_entry *) h; | |
c434dee6 | 1052 | |
26e41594 AM |
1053 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
1054 | if (p->sec == sec) | |
1055 | { | |
1056 | /* Everything must go for SEC. */ | |
1057 | *pp = p->next; | |
1058 | break; | |
1059 | } | |
1060 | } | |
c434dee6 | 1061 | |
26e41594 AM |
1062 | r_type = ELF64_R_TYPE (rel->r_info); |
1063 | r_type = elf64_x86_64_tls_transition (info, r_type, h != NULL); | |
1064 | switch (r_type) | |
1065 | { | |
1066 | case R_X86_64_TLSLD: | |
1067 | if (elf64_x86_64_hash_table (info)->tls_ld_got.refcount > 0) | |
1068 | elf64_x86_64_hash_table (info)->tls_ld_got.refcount -= 1; | |
1069 | break; | |
c434dee6 | 1070 | |
26e41594 AM |
1071 | case R_X86_64_TLSGD: |
1072 | case R_X86_64_GOTTPOFF: | |
1073 | case R_X86_64_GOT32: | |
1074 | case R_X86_64_GOTPCREL: | |
1075 | if (h != NULL) | |
1076 | { | |
1077 | if (h->got.refcount > 0) | |
1078 | h->got.refcount -= 1; | |
1079 | } | |
1080 | else if (local_got_refcounts != NULL) | |
1081 | { | |
1082 | if (local_got_refcounts[r_symndx] > 0) | |
1083 | local_got_refcounts[r_symndx] -= 1; | |
1084 | } | |
1085 | break; | |
c434dee6 | 1086 | |
26e41594 AM |
1087 | case R_X86_64_8: |
1088 | case R_X86_64_16: | |
1089 | case R_X86_64_32: | |
1090 | case R_X86_64_64: | |
1091 | case R_X86_64_32S: | |
1092 | case R_X86_64_PC8: | |
1093 | case R_X86_64_PC16: | |
1094 | case R_X86_64_PC32: | |
1095 | if (info->shared) | |
1096 | break; | |
1097 | /* Fall thru */ | |
c434dee6 | 1098 | |
26e41594 AM |
1099 | case R_X86_64_PLT32: |
1100 | if (h != NULL) | |
1101 | { | |
1102 | if (h->plt.refcount > 0) | |
1103 | h->plt.refcount -= 1; | |
1104 | } | |
1105 | break; | |
70256ad8 | 1106 | |
26e41594 AM |
1107 | default: |
1108 | break; | |
1109 | } | |
1110 | } | |
70256ad8 | 1111 | |
b34976b6 | 1112 | return TRUE; |
70256ad8 AJ |
1113 | } |
1114 | ||
1115 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
1116 | regular object. The current definition is in some section of the | |
1117 | dynamic object, but we're not including those sections. We have to | |
1118 | change the definition to something the rest of the link can | |
407443a3 | 1119 | understand. */ |
70256ad8 | 1120 | |
b34976b6 | 1121 | static bfd_boolean |
27482721 AJ |
1122 | elf64_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info, |
1123 | struct elf_link_hash_entry *h) | |
70256ad8 | 1124 | { |
c434dee6 | 1125 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
1126 | asection *s; |
1127 | unsigned int power_of_two; | |
1128 | ||
70256ad8 AJ |
1129 | /* If this is a function, put it in the procedure linkage table. We |
1130 | will fill in the contents of the procedure linkage table later, | |
1131 | when we know the address of the .got section. */ | |
1132 | if (h->type == STT_FUNC | |
1133 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) | |
1134 | { | |
c434dee6 | 1135 | if (h->plt.refcount <= 0 |
27482721 AJ |
1136 | || SYMBOL_CALLS_LOCAL (info, h) |
1137 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1138 | && h->root.type == bfd_link_hash_undefweak)) | |
70256ad8 | 1139 | { |
70256ad8 AJ |
1140 | /* This case can occur if we saw a PLT32 reloc in an input |
1141 | file, but the symbol was never referred to by a dynamic | |
1142 | object, or if all references were garbage collected. In | |
1143 | such a case, we don't actually need to build a procedure | |
1144 | linkage table, and we can just do a PC32 reloc instead. */ | |
70256ad8 AJ |
1145 | h->plt.offset = (bfd_vma) -1; |
1146 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
70256ad8 AJ |
1147 | } |
1148 | ||
b34976b6 | 1149 | return TRUE; |
70256ad8 | 1150 | } |
bbd7ec4a | 1151 | else |
c434dee6 AJ |
1152 | /* It's possible that we incorrectly decided a .plt reloc was |
1153 | needed for an R_X86_64_PC32 reloc to a non-function sym in | |
1154 | check_relocs. We can't decide accurately between function and | |
1155 | non-function syms in check-relocs; Objects loaded later in | |
1156 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 1157 | h->plt.offset = (bfd_vma) -1; |
70256ad8 AJ |
1158 | |
1159 | /* If this is a weak symbol, and there is a real definition, the | |
1160 | processor independent code will have arranged for us to see the | |
407443a3 | 1161 | real definition first, and we can just use the same value. */ |
70256ad8 AJ |
1162 | if (h->weakdef != NULL) |
1163 | { | |
1164 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
1165 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
1166 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
1167 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
d40d037c AJ |
1168 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
1169 | h->elf_link_hash_flags | |
1170 | = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF) | |
1171 | | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF)); | |
b34976b6 | 1172 | return TRUE; |
70256ad8 AJ |
1173 | } |
1174 | ||
1175 | /* This is a reference to a symbol defined by a dynamic object which | |
407443a3 | 1176 | is not a function. */ |
70256ad8 AJ |
1177 | |
1178 | /* If we are creating a shared library, we must presume that the | |
1179 | only references to the symbol are via the global offset table. | |
1180 | For such cases we need not do anything here; the relocations will | |
407443a3 | 1181 | be handled correctly by relocate_section. */ |
70256ad8 | 1182 | if (info->shared) |
b34976b6 | 1183 | return TRUE; |
70256ad8 AJ |
1184 | |
1185 | /* If there are no references to this symbol that do not use the | |
1186 | GOT, we don't need to generate a copy reloc. */ | |
1187 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) | |
b34976b6 | 1188 | return TRUE; |
70256ad8 | 1189 | |
c434dee6 AJ |
1190 | /* If -z nocopyreloc was given, we won't generate them either. */ |
1191 | if (info->nocopyreloc) | |
1192 | { | |
1193 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; | |
b34976b6 | 1194 | return TRUE; |
c434dee6 AJ |
1195 | } |
1196 | ||
d40d037c | 1197 | if (ELIMINATE_COPY_RELOCS) |
c434dee6 | 1198 | { |
d40d037c AJ |
1199 | struct elf64_x86_64_link_hash_entry * eh; |
1200 | struct elf64_x86_64_dyn_relocs *p; | |
c434dee6 | 1201 | |
d40d037c AJ |
1202 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
1203 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1204 | { | |
1205 | s = p->sec->output_section; | |
1206 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1207 | break; | |
1208 | } | |
1209 | ||
1210 | /* If we didn't find any dynamic relocs in read-only sections, then | |
1211 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
1212 | if (p == NULL) | |
1213 | { | |
1214 | h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; | |
1215 | return TRUE; | |
1216 | } | |
c434dee6 AJ |
1217 | } |
1218 | ||
70256ad8 | 1219 | /* We must allocate the symbol in our .dynbss section, which will |
407443a3 | 1220 | become part of the .bss section of the executable. There will be |
70256ad8 AJ |
1221 | an entry for this symbol in the .dynsym section. The dynamic |
1222 | object will contain position independent code, so all references | |
1223 | from the dynamic object to this symbol will go through the global | |
1224 | offset table. The dynamic linker will use the .dynsym entry to | |
1225 | determine the address it must put in the global offset table, so | |
1226 | both the dynamic object and the regular object will refer to the | |
1227 | same memory location for the variable. */ | |
1228 | ||
c434dee6 | 1229 | htab = elf64_x86_64_hash_table (info); |
70256ad8 AJ |
1230 | |
1231 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker | |
1232 | to copy the initial value out of the dynamic object and into the | |
cedb70c5 | 1233 | runtime process image. */ |
70256ad8 AJ |
1234 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
1235 | { | |
c434dee6 | 1236 | htab->srelbss->_raw_size += sizeof (Elf64_External_Rela); |
70256ad8 AJ |
1237 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
1238 | } | |
1239 | ||
1240 | /* We need to figure out the alignment required for this symbol. I | |
407443a3 | 1241 | have no idea how ELF linkers handle this. 16-bytes is the size |
70256ad8 AJ |
1242 | of the largest type that requires hard alignment -- long double. */ |
1243 | /* FIXME: This is VERY ugly. Should be fixed for all architectures using | |
1244 | this construct. */ | |
1245 | power_of_two = bfd_log2 (h->size); | |
1246 | if (power_of_two > 4) | |
1247 | power_of_two = 4; | |
1248 | ||
1249 | /* Apply the required alignment. */ | |
c434dee6 | 1250 | s = htab->sdynbss; |
70256ad8 | 1251 | s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two)); |
c434dee6 | 1252 | if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) |
70256ad8 | 1253 | { |
c434dee6 | 1254 | if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) |
b34976b6 | 1255 | return FALSE; |
70256ad8 AJ |
1256 | } |
1257 | ||
1258 | /* Define the symbol as being at this point in the section. */ | |
1259 | h->root.u.def.section = s; | |
1260 | h->root.u.def.value = s->_raw_size; | |
1261 | ||
1262 | /* Increment the section size to make room for the symbol. */ | |
1263 | s->_raw_size += h->size; | |
1264 | ||
b34976b6 | 1265 | return TRUE; |
70256ad8 AJ |
1266 | } |
1267 | ||
c434dee6 AJ |
1268 | /* This is the condition under which elf64_x86_64_finish_dynamic_symbol |
1269 | will be called from elflink.h. If elflink.h doesn't call our | |
1270 | finish_dynamic_symbol routine, we'll need to do something about | |
1271 | initializing any .plt and .got entries in elf64_x86_64_relocate_section. */ | |
27482721 | 1272 | #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \ |
c434dee6 | 1273 | ((DYN) \ |
27482721 | 1274 | && ((SHARED) \ |
c434dee6 AJ |
1275 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \ |
1276 | && ((H)->dynindx != -1 \ | |
1277 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)) | |
1278 | ||
1279 | /* Allocate space in .plt, .got and associated reloc sections for | |
1280 | dynamic relocs. */ | |
1281 | ||
b34976b6 | 1282 | static bfd_boolean |
27482721 | 1283 | allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
1284 | { |
1285 | struct bfd_link_info *info; | |
1286 | struct elf64_x86_64_link_hash_table *htab; | |
1287 | struct elf64_x86_64_link_hash_entry *eh; | |
1288 | struct elf64_x86_64_dyn_relocs *p; | |
1289 | ||
e92d460e | 1290 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 1291 | return TRUE; |
c434dee6 | 1292 | |
e92d460e AM |
1293 | if (h->root.type == bfd_link_hash_warning) |
1294 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1295 | ||
c434dee6 AJ |
1296 | info = (struct bfd_link_info *) inf; |
1297 | htab = elf64_x86_64_hash_table (info); | |
1298 | ||
1299 | if (htab->elf.dynamic_sections_created | |
27482721 | 1300 | && h->plt.refcount > 0) |
c434dee6 AJ |
1301 | { |
1302 | /* Make sure this symbol is output as a dynamic symbol. | |
1303 | Undefined weak syms won't yet be marked as dynamic. */ | |
1304 | if (h->dynindx == -1 | |
1305 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1306 | { | |
1307 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 1308 | return FALSE; |
c434dee6 AJ |
1309 | } |
1310 | ||
27482721 AJ |
1311 | if (info->shared |
1312 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
c434dee6 AJ |
1313 | { |
1314 | asection *s = htab->splt; | |
1315 | ||
1316 | /* If this is the first .plt entry, make room for the special | |
1317 | first entry. */ | |
1318 | if (s->_raw_size == 0) | |
1319 | s->_raw_size += PLT_ENTRY_SIZE; | |
1320 | ||
1321 | h->plt.offset = s->_raw_size; | |
1322 | ||
1323 | /* If this symbol is not defined in a regular file, and we are | |
1324 | not generating a shared library, then set the symbol to this | |
1325 | location in the .plt. This is required to make function | |
1326 | pointers compare as equal between the normal executable and | |
1327 | the shared library. */ | |
1328 | if (! info->shared | |
1329 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1330 | { | |
1331 | h->root.u.def.section = s; | |
1332 | h->root.u.def.value = h->plt.offset; | |
1333 | } | |
1334 | ||
1335 | /* Make room for this entry. */ | |
1336 | s->_raw_size += PLT_ENTRY_SIZE; | |
1337 | ||
1338 | /* We also need to make an entry in the .got.plt section, which | |
1339 | will be placed in the .got section by the linker script. */ | |
1340 | htab->sgotplt->_raw_size += GOT_ENTRY_SIZE; | |
1341 | ||
1342 | /* We also need to make an entry in the .rela.plt section. */ | |
1343 | htab->srelplt->_raw_size += sizeof (Elf64_External_Rela); | |
1344 | } | |
1345 | else | |
1346 | { | |
1347 | h->plt.offset = (bfd_vma) -1; | |
1348 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
1349 | } | |
1350 | } | |
1351 | else | |
1352 | { | |
1353 | h->plt.offset = (bfd_vma) -1; | |
1354 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
1355 | } | |
1356 | ||
bffbf940 JJ |
1357 | /* If R_X86_64_GOTTPOFF symbol is now local to the binary, |
1358 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
1359 | if (h->got.refcount > 0 | |
1360 | && !info->shared | |
1361 | && h->dynindx == -1 | |
1362 | && elf64_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE) | |
1363 | h->got.offset = (bfd_vma) -1; | |
1364 | else if (h->got.refcount > 0) | |
c434dee6 AJ |
1365 | { |
1366 | asection *s; | |
b34976b6 | 1367 | bfd_boolean dyn; |
bffbf940 | 1368 | int tls_type = elf64_x86_64_hash_entry (h)->tls_type; |
c434dee6 AJ |
1369 | |
1370 | /* Make sure this symbol is output as a dynamic symbol. | |
1371 | Undefined weak syms won't yet be marked as dynamic. */ | |
1372 | if (h->dynindx == -1 | |
1373 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1374 | { | |
1375 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 1376 | return FALSE; |
c434dee6 AJ |
1377 | } |
1378 | ||
1379 | s = htab->sgot; | |
1380 | h->got.offset = s->_raw_size; | |
1381 | s->_raw_size += GOT_ENTRY_SIZE; | |
bffbf940 JJ |
1382 | /* R_X86_64_TLSGD needs 2 consecutive GOT slots. */ |
1383 | if (tls_type == GOT_TLS_GD) | |
1384 | s->_raw_size += GOT_ENTRY_SIZE; | |
c434dee6 | 1385 | dyn = htab->elf.dynamic_sections_created; |
bffbf940 JJ |
1386 | /* R_X86_64_TLSGD needs one dynamic relocation if local symbol |
1387 | and two if global. | |
1388 | R_X86_64_GOTTPOFF needs one dynamic relocation. */ | |
1389 | if ((tls_type == GOT_TLS_GD && h->dynindx == -1) | |
1390 | || tls_type == GOT_TLS_IE) | |
1391 | htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); | |
1392 | else if (tls_type == GOT_TLS_GD) | |
1393 | htab->srelgot->_raw_size += 2 * sizeof (Elf64_External_Rela); | |
4bc6e03a AJ |
1394 | else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
1395 | || h->root.type != bfd_link_hash_undefweak) | |
27482721 AJ |
1396 | && (info->shared |
1397 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
c434dee6 AJ |
1398 | htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); |
1399 | } | |
1400 | else | |
1401 | h->got.offset = (bfd_vma) -1; | |
1402 | ||
1403 | eh = (struct elf64_x86_64_link_hash_entry *) h; | |
1404 | if (eh->dyn_relocs == NULL) | |
b34976b6 | 1405 | return TRUE; |
c434dee6 AJ |
1406 | |
1407 | /* In the shared -Bsymbolic case, discard space allocated for | |
1408 | dynamic pc-relative relocs against symbols which turn out to be | |
1409 | defined in regular objects. For the normal shared case, discard | |
1410 | space for pc-relative relocs that have become local due to symbol | |
1411 | visibility changes. */ | |
1412 | ||
1413 | if (info->shared) | |
1414 | { | |
27482721 AJ |
1415 | /* Relocs that use pc_count are those that appear on a call |
1416 | insn, or certain REL relocs that can generated via assembly. | |
1417 | We want calls to protected symbols to resolve directly to the | |
1418 | function rather than going via the plt. If people want | |
1419 | function pointer comparisons to work as expected then they | |
1420 | should avoid writing weird assembly. */ | |
1421 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
c434dee6 AJ |
1422 | { |
1423 | struct elf64_x86_64_dyn_relocs **pp; | |
1424 | ||
1425 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
1426 | { | |
1427 | p->count -= p->pc_count; | |
1428 | p->pc_count = 0; | |
1429 | if (p->count == 0) | |
1430 | *pp = p->next; | |
1431 | else | |
1432 | pp = &p->next; | |
1433 | } | |
1434 | } | |
4e795f50 AM |
1435 | |
1436 | /* Also discard relocs on undefined weak syms with non-default | |
1437 | visibility. */ | |
1438 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1439 | && h->root.type == bfd_link_hash_undefweak) | |
1440 | eh->dyn_relocs = NULL; | |
c434dee6 | 1441 | } |
d40d037c | 1442 | else if (ELIMINATE_COPY_RELOCS) |
c434dee6 AJ |
1443 | { |
1444 | /* For the non-shared case, discard space for relocs against | |
1445 | symbols which turn out to need copy relocs or are not | |
1446 | dynamic. */ | |
1447 | ||
1448 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
1449 | && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
1450 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1451 | || (htab->elf.dynamic_sections_created | |
1452 | && (h->root.type == bfd_link_hash_undefweak | |
1453 | || h->root.type == bfd_link_hash_undefined)))) | |
1454 | { | |
1455 | /* Make sure this symbol is output as a dynamic symbol. | |
1456 | Undefined weak syms won't yet be marked as dynamic. */ | |
1457 | if (h->dynindx == -1 | |
1458 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
1459 | { | |
1460 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 1461 | return FALSE; |
c434dee6 AJ |
1462 | } |
1463 | ||
1464 | /* If that succeeded, we know we'll be keeping all the | |
1465 | relocs. */ | |
1466 | if (h->dynindx != -1) | |
1467 | goto keep; | |
1468 | } | |
1469 | ||
1470 | eh->dyn_relocs = NULL; | |
1471 | ||
1472 | keep: ; | |
1473 | } | |
1474 | ||
1475 | /* Finally, allocate space. */ | |
1476 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1477 | { | |
1478 | asection *sreloc = elf_section_data (p->sec)->sreloc; | |
1479 | sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela); | |
1480 | } | |
1481 | ||
b34976b6 | 1482 | return TRUE; |
c434dee6 AJ |
1483 | } |
1484 | ||
1485 | /* Find any dynamic relocs that apply to read-only sections. */ | |
1486 | ||
b34976b6 | 1487 | static bfd_boolean |
27482721 | 1488 | readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
1489 | { |
1490 | struct elf64_x86_64_link_hash_entry *eh; | |
1491 | struct elf64_x86_64_dyn_relocs *p; | |
1492 | ||
e92d460e AM |
1493 | if (h->root.type == bfd_link_hash_warning) |
1494 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1495 | ||
c434dee6 AJ |
1496 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
1497 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1498 | { | |
1499 | asection *s = p->sec->output_section; | |
1500 | ||
1501 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1502 | { | |
1503 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
1504 | ||
1505 | info->flags |= DF_TEXTREL; | |
1506 | ||
1507 | /* Not an error, just cut short the traversal. */ | |
b34976b6 | 1508 | return FALSE; |
c434dee6 AJ |
1509 | } |
1510 | } | |
b34976b6 | 1511 | return TRUE; |
c434dee6 AJ |
1512 | } |
1513 | ||
70256ad8 AJ |
1514 | /* Set the sizes of the dynamic sections. */ |
1515 | ||
b34976b6 | 1516 | static bfd_boolean |
27482721 AJ |
1517 | elf64_x86_64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
1518 | struct bfd_link_info *info) | |
70256ad8 | 1519 | { |
c434dee6 | 1520 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
1521 | bfd *dynobj; |
1522 | asection *s; | |
b34976b6 | 1523 | bfd_boolean relocs; |
c434dee6 | 1524 | bfd *ibfd; |
70256ad8 | 1525 | |
c434dee6 AJ |
1526 | htab = elf64_x86_64_hash_table (info); |
1527 | dynobj = htab->elf.dynobj; | |
1528 | if (dynobj == NULL) | |
1529 | abort (); | |
70256ad8 | 1530 | |
c434dee6 | 1531 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
1532 | { |
1533 | /* Set the contents of the .interp section to the interpreter. */ | |
36af4a4e | 1534 | if (info->executable) |
70256ad8 AJ |
1535 | { |
1536 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
c434dee6 AJ |
1537 | if (s == NULL) |
1538 | abort (); | |
70256ad8 AJ |
1539 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; |
1540 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
1541 | } | |
1542 | } | |
70256ad8 | 1543 | |
c434dee6 AJ |
1544 | /* Set up .got offsets for local syms, and space for local dynamic |
1545 | relocs. */ | |
1546 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
70256ad8 | 1547 | { |
c434dee6 AJ |
1548 | bfd_signed_vma *local_got; |
1549 | bfd_signed_vma *end_local_got; | |
bffbf940 | 1550 | char *local_tls_type; |
c434dee6 AJ |
1551 | bfd_size_type locsymcount; |
1552 | Elf_Internal_Shdr *symtab_hdr; | |
1553 | asection *srel; | |
70256ad8 | 1554 | |
c434dee6 | 1555 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
70256ad8 AJ |
1556 | continue; |
1557 | ||
c434dee6 | 1558 | for (s = ibfd->sections; s != NULL; s = s->next) |
70256ad8 | 1559 | { |
c434dee6 AJ |
1560 | struct elf64_x86_64_dyn_relocs *p; |
1561 | ||
1562 | for (p = *((struct elf64_x86_64_dyn_relocs **) | |
1563 | &elf_section_data (s)->local_dynrel); | |
1564 | p != NULL; | |
1565 | p = p->next) | |
70256ad8 | 1566 | { |
c434dee6 AJ |
1567 | if (!bfd_is_abs_section (p->sec) |
1568 | && bfd_is_abs_section (p->sec->output_section)) | |
1569 | { | |
1570 | /* Input section has been discarded, either because | |
1571 | it is a copy of a linkonce section or due to | |
1572 | linker script /DISCARD/, so we'll be discarding | |
1573 | the relocs too. */ | |
1574 | } | |
1575 | else if (p->count != 0) | |
1576 | { | |
1577 | srel = elf_section_data (p->sec)->sreloc; | |
1578 | srel->_raw_size += p->count * sizeof (Elf64_External_Rela); | |
1579 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) | |
1580 | info->flags |= DF_TEXTREL; | |
1581 | ||
1582 | } | |
70256ad8 AJ |
1583 | } |
1584 | } | |
c434dee6 AJ |
1585 | |
1586 | local_got = elf_local_got_refcounts (ibfd); | |
1587 | if (!local_got) | |
1588 | continue; | |
1589 | ||
1590 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
1591 | locsymcount = symtab_hdr->sh_info; | |
1592 | end_local_got = local_got + locsymcount; | |
bffbf940 | 1593 | local_tls_type = elf64_x86_64_local_got_tls_type (ibfd); |
c434dee6 AJ |
1594 | s = htab->sgot; |
1595 | srel = htab->srelgot; | |
bffbf940 | 1596 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) |
70256ad8 | 1597 | { |
c434dee6 | 1598 | if (*local_got > 0) |
70256ad8 | 1599 | { |
c434dee6 AJ |
1600 | *local_got = s->_raw_size; |
1601 | s->_raw_size += GOT_ENTRY_SIZE; | |
bffbf940 JJ |
1602 | if (*local_tls_type == GOT_TLS_GD) |
1603 | s->_raw_size += GOT_ENTRY_SIZE; | |
1604 | if (info->shared | |
1605 | || *local_tls_type == GOT_TLS_GD | |
1606 | || *local_tls_type == GOT_TLS_IE) | |
c434dee6 | 1607 | srel->_raw_size += sizeof (Elf64_External_Rela); |
70256ad8 AJ |
1608 | } |
1609 | else | |
c434dee6 AJ |
1610 | *local_got = (bfd_vma) -1; |
1611 | } | |
1612 | } | |
70256ad8 | 1613 | |
bffbf940 JJ |
1614 | if (htab->tls_ld_got.refcount > 0) |
1615 | { | |
1616 | /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD | |
1617 | relocs. */ | |
1618 | htab->tls_ld_got.offset = htab->sgot->_raw_size; | |
1619 | htab->sgot->_raw_size += 2 * GOT_ENTRY_SIZE; | |
1620 | htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); | |
1621 | } | |
1622 | else | |
1623 | htab->tls_ld_got.offset = -1; | |
1624 | ||
c434dee6 AJ |
1625 | /* Allocate global sym .plt and .got entries, and space for global |
1626 | sym dynamic relocs. */ | |
1627 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); | |
1628 | ||
1629 | /* We now have determined the sizes of the various dynamic sections. | |
1630 | Allocate memory for them. */ | |
b34976b6 | 1631 | relocs = FALSE; |
c434dee6 AJ |
1632 | for (s = dynobj->sections; s != NULL; s = s->next) |
1633 | { | |
1634 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
1635 | continue; | |
1636 | ||
1637 | if (s == htab->splt | |
1638 | || s == htab->sgot | |
1639 | || s == htab->sgotplt) | |
1640 | { | |
1641 | /* Strip this section if we don't need it; see the | |
1642 | comment below. */ | |
1643 | } | |
1644 | else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) | |
1645 | { | |
1646 | if (s->_raw_size != 0 && s != htab->srelplt) | |
b34976b6 | 1647 | relocs = TRUE; |
c434dee6 AJ |
1648 | |
1649 | /* We use the reloc_count field as a counter if we need | |
1650 | to copy relocs into the output file. */ | |
1651 | s->reloc_count = 0; | |
70256ad8 | 1652 | } |
c434dee6 | 1653 | else |
70256ad8 AJ |
1654 | { |
1655 | /* It's not one of our sections, so don't allocate space. */ | |
1656 | continue; | |
1657 | } | |
1658 | ||
c434dee6 | 1659 | if (s->_raw_size == 0) |
70256ad8 | 1660 | { |
c434dee6 AJ |
1661 | /* If we don't need this section, strip it from the |
1662 | output file. This is mostly to handle .rela.bss and | |
1663 | .rela.plt. We must create both sections in | |
1664 | create_dynamic_sections, because they must be created | |
1665 | before the linker maps input sections to output | |
1666 | sections. The linker does that before | |
1667 | adjust_dynamic_symbol is called, and it is that | |
1668 | function which decides whether anything needs to go | |
1669 | into these sections. */ | |
1670 | ||
70256ad8 AJ |
1671 | _bfd_strip_section_from_output (info, s); |
1672 | continue; | |
1673 | } | |
1674 | ||
1675 | /* Allocate memory for the section contents. We use bfd_zalloc | |
1676 | here in case unused entries are not reclaimed before the | |
1677 | section's contents are written out. This should not happen, | |
1678 | but this way if it does, we get a R_X86_64_NONE reloc instead | |
1679 | of garbage. */ | |
1680 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); | |
c434dee6 | 1681 | if (s->contents == NULL) |
b34976b6 | 1682 | return FALSE; |
70256ad8 AJ |
1683 | } |
1684 | ||
c434dee6 | 1685 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
1686 | { |
1687 | /* Add some entries to the .dynamic section. We fill in the | |
1688 | values later, in elf64_x86_64_finish_dynamic_sections, but we | |
1689 | must add the entries now so that we get the correct size for | |
407443a3 | 1690 | the .dynamic section. The DT_DEBUG entry is filled in by the |
70256ad8 | 1691 | dynamic linker and used by the debugger. */ |
dc810e39 AM |
1692 | #define add_dynamic_entry(TAG, VAL) \ |
1693 | bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) | |
1694 | ||
36af4a4e | 1695 | if (info->executable) |
70256ad8 | 1696 | { |
dc810e39 | 1697 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 1698 | return FALSE; |
70256ad8 AJ |
1699 | } |
1700 | ||
c434dee6 | 1701 | if (htab->splt->_raw_size != 0) |
70256ad8 | 1702 | { |
dc810e39 AM |
1703 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
1704 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
1705 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
1706 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 1707 | return FALSE; |
70256ad8 AJ |
1708 | } |
1709 | ||
1710 | if (relocs) | |
1711 | { | |
dc810e39 AM |
1712 | if (!add_dynamic_entry (DT_RELA, 0) |
1713 | || !add_dynamic_entry (DT_RELASZ, 0) | |
1714 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) | |
b34976b6 | 1715 | return FALSE; |
70256ad8 | 1716 | |
c434dee6 AJ |
1717 | /* If any dynamic relocs apply to a read-only section, |
1718 | then we need a DT_TEXTREL entry. */ | |
1719 | if ((info->flags & DF_TEXTREL) == 0) | |
1720 | elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, | |
1721 | (PTR) info); | |
1722 | ||
1723 | if ((info->flags & DF_TEXTREL) != 0) | |
1724 | { | |
1725 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 1726 | return FALSE; |
c434dee6 | 1727 | } |
70256ad8 AJ |
1728 | } |
1729 | } | |
dc810e39 | 1730 | #undef add_dynamic_entry |
70256ad8 | 1731 | |
b34976b6 | 1732 | return TRUE; |
70256ad8 AJ |
1733 | } |
1734 | ||
bffbf940 JJ |
1735 | /* Return the base VMA address which should be subtracted from real addresses |
1736 | when resolving @dtpoff relocation. | |
1737 | This is PT_TLS segment p_vaddr. */ | |
1738 | ||
1739 | static bfd_vma | |
27482721 | 1740 | dtpoff_base (struct bfd_link_info *info) |
bffbf940 JJ |
1741 | { |
1742 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
1743 | if (elf_hash_table (info)->tls_segment == NULL) | |
1744 | return 0; | |
1745 | return elf_hash_table (info)->tls_segment->start; | |
1746 | } | |
1747 | ||
1748 | /* Return the relocation value for @tpoff relocation | |
1749 | if STT_TLS virtual address is ADDRESS. */ | |
1750 | ||
1751 | static bfd_vma | |
27482721 | 1752 | tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 JJ |
1753 | { |
1754 | struct elf_link_tls_segment *tls_segment | |
1755 | = elf_hash_table (info)->tls_segment; | |
1756 | ||
1757 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
1758 | if (tls_segment == NULL) | |
1759 | return 0; | |
1760 | return address - align_power (tls_segment->size, tls_segment->align) | |
1761 | - tls_segment->start; | |
1762 | } | |
1763 | ||
8d88c4ca NC |
1764 | /* Relocate an x86_64 ELF section. */ |
1765 | ||
b34976b6 | 1766 | static bfd_boolean |
27482721 AJ |
1767 | elf64_x86_64_relocate_section (bfd *output_bfd, struct bfd_link_info *info, |
1768 | bfd *input_bfd, asection *input_section, | |
1769 | bfd_byte *contents, Elf_Internal_Rela *relocs, | |
1770 | Elf_Internal_Sym *local_syms, | |
1771 | asection **local_sections) | |
8d88c4ca | 1772 | { |
c434dee6 | 1773 | struct elf64_x86_64_link_hash_table *htab; |
8d88c4ca NC |
1774 | Elf_Internal_Shdr *symtab_hdr; |
1775 | struct elf_link_hash_entry **sym_hashes; | |
1776 | bfd_vma *local_got_offsets; | |
c434dee6 | 1777 | Elf_Internal_Rela *rel; |
8d88c4ca NC |
1778 | Elf_Internal_Rela *relend; |
1779 | ||
1049f94e | 1780 | if (info->relocatable) |
b34976b6 | 1781 | return TRUE; |
b491616a | 1782 | |
c434dee6 | 1783 | htab = elf64_x86_64_hash_table (info); |
8d88c4ca NC |
1784 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
1785 | sym_hashes = elf_sym_hashes (input_bfd); | |
1786 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
1787 | ||
c434dee6 | 1788 | rel = relocs; |
8d88c4ca | 1789 | relend = relocs + input_section->reloc_count; |
c434dee6 | 1790 | for (; rel < relend; rel++) |
8d88c4ca | 1791 | { |
bffbf940 | 1792 | unsigned int r_type; |
8d88c4ca NC |
1793 | reloc_howto_type *howto; |
1794 | unsigned long r_symndx; | |
1795 | struct elf_link_hash_entry *h; | |
1796 | Elf_Internal_Sym *sym; | |
1797 | asection *sec; | |
c434dee6 | 1798 | bfd_vma off; |
8d88c4ca | 1799 | bfd_vma relocation; |
b34976b6 | 1800 | bfd_boolean unresolved_reloc; |
8d88c4ca | 1801 | bfd_reloc_status_type r; |
bffbf940 | 1802 | int tls_type; |
8d88c4ca | 1803 | |
c434dee6 | 1804 | r_type = ELF64_R_TYPE (rel->r_info); |
fe4770f4 AJ |
1805 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
1806 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
1807 | continue; | |
8d88c4ca | 1808 | |
bffbf940 | 1809 | if (r_type >= R_X86_64_max) |
8da6118f KH |
1810 | { |
1811 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 1812 | return FALSE; |
8da6118f | 1813 | } |
8d88c4ca | 1814 | |
b491616a | 1815 | howto = x86_64_elf_howto_table + r_type; |
c434dee6 | 1816 | r_symndx = ELF64_R_SYM (rel->r_info); |
8d88c4ca NC |
1817 | h = NULL; |
1818 | sym = NULL; | |
1819 | sec = NULL; | |
b34976b6 | 1820 | unresolved_reloc = FALSE; |
8d88c4ca | 1821 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
1822 | { |
1823 | sym = local_syms + r_symndx; | |
1824 | sec = local_sections[r_symndx]; | |
c434dee6 AJ |
1825 | |
1826 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel); | |
8da6118f | 1827 | } |
8d88c4ca | 1828 | else |
8da6118f | 1829 | { |
560e09e9 | 1830 | bfd_boolean warned; |
c434dee6 | 1831 | |
560e09e9 NC |
1832 | RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx, |
1833 | symtab_hdr, relocation, sec, | |
1834 | unresolved_reloc, info, | |
1835 | warned); | |
8da6118f | 1836 | } |
70256ad8 AJ |
1837 | /* When generating a shared object, the relocations handled here are |
1838 | copied into the output file to be resolved at run time. */ | |
1839 | switch (r_type) | |
1840 | { | |
1841 | case R_X86_64_GOT32: | |
1842 | /* Relocation is to the entry for this symbol in the global | |
1843 | offset table. */ | |
70256ad8 AJ |
1844 | case R_X86_64_GOTPCREL: |
1845 | /* Use global offset table as symbol value. */ | |
c434dee6 AJ |
1846 | if (htab->sgot == NULL) |
1847 | abort (); | |
053579d7 | 1848 | |
51e0a107 | 1849 | if (h != NULL) |
70256ad8 | 1850 | { |
b34976b6 | 1851 | bfd_boolean dyn; |
c434dee6 AJ |
1852 | |
1853 | off = h->got.offset; | |
1854 | dyn = htab->elf.dynamic_sections_created; | |
51e0a107 | 1855 | |
27482721 | 1856 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
51e0a107 | 1857 | || (info->shared |
27482721 | 1858 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
4bc6e03a AJ |
1859 | || (ELF_ST_VISIBILITY (h->other) |
1860 | && h->root.type == bfd_link_hash_undefweak)) | |
51e0a107 JH |
1861 | { |
1862 | /* This is actually a static link, or it is a -Bsymbolic | |
1863 | link and the symbol is defined locally, or the symbol | |
407443a3 | 1864 | was forced to be local because of a version file. We |
51e0a107 JH |
1865 | must initialize this entry in the global offset table. |
1866 | Since the offset must always be a multiple of 8, we | |
1867 | use the least significant bit to record whether we | |
1868 | have initialized it already. | |
1869 | ||
1870 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
1871 | relocation entry to initialize the value. This is |
1872 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
1873 | if ((off & 1) != 0) |
1874 | off &= ~1; | |
1875 | else | |
1876 | { | |
1877 | bfd_put_64 (output_bfd, relocation, | |
c434dee6 | 1878 | htab->sgot->contents + off); |
51e0a107 JH |
1879 | h->got.offset |= 1; |
1880 | } | |
1881 | } | |
053579d7 | 1882 | else |
b34976b6 | 1883 | unresolved_reloc = FALSE; |
70256ad8 | 1884 | } |
51e0a107 JH |
1885 | else |
1886 | { | |
c434dee6 AJ |
1887 | if (local_got_offsets == NULL) |
1888 | abort (); | |
51e0a107 JH |
1889 | |
1890 | off = local_got_offsets[r_symndx]; | |
1891 | ||
1892 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
1893 | the least significant bit to record whether we have |
1894 | already generated the necessary reloc. */ | |
51e0a107 JH |
1895 | if ((off & 1) != 0) |
1896 | off &= ~1; | |
1897 | else | |
1898 | { | |
c434dee6 AJ |
1899 | bfd_put_64 (output_bfd, relocation, |
1900 | htab->sgot->contents + off); | |
51e0a107 JH |
1901 | |
1902 | if (info->shared) | |
1903 | { | |
947216bf | 1904 | asection *s; |
51e0a107 | 1905 | Elf_Internal_Rela outrel; |
947216bf | 1906 | bfd_byte *loc; |
70256ad8 | 1907 | |
51e0a107 JH |
1908 | /* We need to generate a R_X86_64_RELATIVE reloc |
1909 | for the dynamic linker. */ | |
947216bf AM |
1910 | s = htab->srelgot; |
1911 | if (s == NULL) | |
c434dee6 | 1912 | abort (); |
51e0a107 | 1913 | |
c434dee6 AJ |
1914 | outrel.r_offset = (htab->sgot->output_section->vma |
1915 | + htab->sgot->output_offset | |
51e0a107 JH |
1916 | + off); |
1917 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); | |
1918 | outrel.r_addend = relocation; | |
947216bf AM |
1919 | loc = s->contents; |
1920 | loc += s->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 1921 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
51e0a107 JH |
1922 | } |
1923 | ||
1924 | local_got_offsets[r_symndx] |= 1; | |
1925 | } | |
51e0a107 | 1926 | } |
6a2bda3f | 1927 | |
c434dee6 AJ |
1928 | if (off >= (bfd_vma) -2) |
1929 | abort (); | |
1930 | ||
1931 | relocation = htab->sgot->output_offset + off; | |
1932 | if (r_type == R_X86_64_GOTPCREL) | |
1933 | relocation += htab->sgot->output_section->vma; | |
1934 | ||
70256ad8 AJ |
1935 | break; |
1936 | ||
1937 | case R_X86_64_PLT32: | |
1938 | /* Relocation is to the entry for this symbol in the | |
1939 | procedure linkage table. */ | |
1940 | ||
1941 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 1942 | without using the procedure linkage table. */ |
70256ad8 AJ |
1943 | if (h == NULL) |
1944 | break; | |
1945 | ||
c434dee6 AJ |
1946 | if (h->plt.offset == (bfd_vma) -1 |
1947 | || htab->splt == NULL) | |
70256ad8 AJ |
1948 | { |
1949 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
1950 | happens when statically linking PIC code, or when |
1951 | using -Bsymbolic. */ | |
70256ad8 AJ |
1952 | break; |
1953 | } | |
1954 | ||
c434dee6 AJ |
1955 | relocation = (htab->splt->output_section->vma |
1956 | + htab->splt->output_offset | |
70256ad8 | 1957 | + h->plt.offset); |
b34976b6 | 1958 | unresolved_reloc = FALSE; |
70256ad8 AJ |
1959 | break; |
1960 | ||
fd8ab9e5 AJ |
1961 | case R_X86_64_PC8: |
1962 | case R_X86_64_PC16: | |
1963 | case R_X86_64_PC32: | |
70256ad8 AJ |
1964 | case R_X86_64_8: |
1965 | case R_X86_64_16: | |
1966 | case R_X86_64_32: | |
6b3db546 | 1967 | case R_X86_64_64: |
80643fbc | 1968 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 1969 | the same when it's zeroextended to 64 bit. */ |
c434dee6 AJ |
1970 | |
1971 | /* r_symndx will be zero only for relocs against symbols | |
1972 | from removed linkonce sections, or sections discarded by | |
1973 | a linker script. */ | |
1974 | if (r_symndx == 0 | |
1975 | || (input_section->flags & SEC_ALLOC) == 0) | |
1976 | break; | |
1977 | ||
1978 | if ((info->shared | |
4bc6e03a AJ |
1979 | && (h == NULL |
1980 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
1981 | || h->root.type != bfd_link_hash_undefweak) | |
c434dee6 AJ |
1982 | && ((r_type != R_X86_64_PC8 |
1983 | && r_type != R_X86_64_PC16 | |
1984 | && r_type != R_X86_64_PC32) | |
f6c52c13 | 1985 | || !SYMBOL_CALLS_LOCAL (info, h))) |
d40d037c AJ |
1986 | || (ELIMINATE_COPY_RELOCS |
1987 | && !info->shared | |
c434dee6 AJ |
1988 | && h != NULL |
1989 | && h->dynindx != -1 | |
1990 | && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
1991 | && (((h->elf_link_hash_flags | |
1992 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
1993 | && (h->elf_link_hash_flags | |
1994 | & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1995 | || h->root.type == bfd_link_hash_undefweak | |
1996 | || h->root.type == bfd_link_hash_undefined))) | |
70256ad8 AJ |
1997 | { |
1998 | Elf_Internal_Rela outrel; | |
947216bf | 1999 | bfd_byte *loc; |
b34976b6 | 2000 | bfd_boolean skip, relocate; |
c434dee6 | 2001 | asection *sreloc; |
70256ad8 AJ |
2002 | |
2003 | /* When generating a shared object, these relocations | |
2004 | are copied into the output file to be resolved at run | |
407443a3 | 2005 | time. */ |
b34976b6 AM |
2006 | skip = FALSE; |
2007 | relocate = FALSE; | |
70256ad8 | 2008 | |
c629eae0 JJ |
2009 | outrel.r_offset = |
2010 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 2011 | rel->r_offset); |
c629eae0 | 2012 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 2013 | skip = TRUE; |
0fb19cbc | 2014 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 2015 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
2016 | |
2017 | outrel.r_offset += (input_section->output_section->vma | |
2018 | + input_section->output_offset); | |
2019 | ||
2020 | if (skip) | |
0bb2d96a | 2021 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 2022 | |
fd8ab9e5 AJ |
2023 | /* h->dynindx may be -1 if this symbol was marked to |
2024 | become local. */ | |
2025 | else if (h != NULL | |
c434dee6 AJ |
2026 | && h->dynindx != -1 |
2027 | && (r_type == R_X86_64_PC8 | |
2028 | || r_type == R_X86_64_PC16 | |
2029 | || r_type == R_X86_64_PC32 | |
2030 | || !info->shared | |
2031 | || !info->symbolic | |
fd8ab9e5 AJ |
2032 | || (h->elf_link_hash_flags |
2033 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
70256ad8 | 2034 | { |
70256ad8 | 2035 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); |
c434dee6 | 2036 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
2037 | } |
2038 | else | |
2039 | { | |
c434dee6 | 2040 | /* This symbol is local, or marked to become local. */ |
607c0e09 AS |
2041 | if (r_type == R_X86_64_64) |
2042 | { | |
b34976b6 | 2043 | relocate = TRUE; |
607c0e09 AS |
2044 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); |
2045 | outrel.r_addend = relocation + rel->r_addend; | |
2046 | } | |
2047 | else | |
2048 | { | |
2049 | long sindx; | |
2050 | ||
2051 | if (h == NULL) | |
2052 | sec = local_sections[r_symndx]; | |
2053 | else | |
2054 | { | |
2055 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
2056 | || (h->root.type | |
2057 | == bfd_link_hash_defweak)); | |
2058 | sec = h->root.u.def.section; | |
2059 | } | |
2060 | if (sec != NULL && bfd_is_abs_section (sec)) | |
2061 | sindx = 0; | |
2062 | else if (sec == NULL || sec->owner == NULL) | |
2063 | { | |
2064 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2065 | return FALSE; |
607c0e09 AS |
2066 | } |
2067 | else | |
2068 | { | |
2069 | asection *osec; | |
2070 | ||
2071 | osec = sec->output_section; | |
2072 | sindx = elf_section_data (osec)->dynindx; | |
2073 | BFD_ASSERT (sindx > 0); | |
2074 | } | |
2075 | ||
2076 | outrel.r_info = ELF64_R_INFO (sindx, r_type); | |
2077 | outrel.r_addend = relocation + rel->r_addend; | |
2078 | } | |
70256ad8 AJ |
2079 | } |
2080 | ||
c434dee6 AJ |
2081 | sreloc = elf_section_data (input_section)->sreloc; |
2082 | if (sreloc == NULL) | |
2083 | abort (); | |
2084 | ||
947216bf AM |
2085 | loc = sreloc->contents; |
2086 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 2087 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
70256ad8 AJ |
2088 | |
2089 | /* If this reloc is against an external symbol, we do | |
2090 | not want to fiddle with the addend. Otherwise, we | |
2091 | need to include the symbol value so that it becomes | |
2092 | an addend for the dynamic reloc. */ | |
2093 | if (! relocate) | |
2094 | continue; | |
2095 | } | |
2096 | ||
2097 | break; | |
2098 | ||
bffbf940 JJ |
2099 | case R_X86_64_TLSGD: |
2100 | case R_X86_64_GOTTPOFF: | |
2101 | r_type = elf64_x86_64_tls_transition (info, r_type, h == NULL); | |
2102 | tls_type = GOT_UNKNOWN; | |
2103 | if (h == NULL && local_got_offsets) | |
2104 | tls_type = elf64_x86_64_local_got_tls_type (input_bfd) [r_symndx]; | |
2105 | else if (h != NULL) | |
2106 | { | |
2107 | tls_type = elf64_x86_64_hash_entry (h)->tls_type; | |
2108 | if (!info->shared && h->dynindx == -1 && tls_type == GOT_TLS_IE) | |
2109 | r_type = R_X86_64_TPOFF32; | |
2110 | } | |
2111 | if (r_type == R_X86_64_TLSGD) | |
2112 | { | |
2113 | if (tls_type == GOT_TLS_IE) | |
2114 | r_type = R_X86_64_GOTTPOFF; | |
2115 | } | |
2116 | ||
2117 | if (r_type == R_X86_64_TPOFF32) | |
2118 | { | |
2119 | BFD_ASSERT (! unresolved_reloc); | |
2120 | if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSGD) | |
2121 | { | |
2122 | unsigned int i; | |
abcf1d52 JJ |
2123 | static unsigned char tlsgd[8] |
2124 | = { 0x66, 0x48, 0x8d, 0x3d, 0x66, 0x66, 0x48, 0xe8 }; | |
bffbf940 JJ |
2125 | |
2126 | /* GD->LE transition. | |
abcf1d52 JJ |
2127 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
2128 | .word 0x6666; rex64; call __tls_get_addr@plt | |
bffbf940 JJ |
2129 | Change it into: |
2130 | movq %fs:0, %rax | |
2131 | leaq foo@tpoff(%rax), %rax */ | |
abcf1d52 JJ |
2132 | BFD_ASSERT (rel->r_offset >= 4); |
2133 | for (i = 0; i < 4; i++) | |
bffbf940 | 2134 | BFD_ASSERT (bfd_get_8 (input_bfd, |
abcf1d52 | 2135 | contents + rel->r_offset - 4 + i) |
bffbf940 | 2136 | == tlsgd[i]); |
abcf1d52 JJ |
2137 | BFD_ASSERT (rel->r_offset + 12 <= input_section->_raw_size); |
2138 | for (i = 0; i < 4; i++) | |
2139 | BFD_ASSERT (bfd_get_8 (input_bfd, | |
2140 | contents + rel->r_offset + 4 + i) | |
2141 | == tlsgd[i+4]); | |
bffbf940 JJ |
2142 | BFD_ASSERT (rel + 1 < relend); |
2143 | BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); | |
abcf1d52 | 2144 | memcpy (contents + rel->r_offset - 4, |
bffbf940 JJ |
2145 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", |
2146 | 16); | |
2147 | bfd_put_32 (output_bfd, tpoff (info, relocation), | |
abcf1d52 | 2148 | contents + rel->r_offset + 8); |
bffbf940 JJ |
2149 | /* Skip R_X86_64_PLT32. */ |
2150 | rel++; | |
2151 | continue; | |
2152 | } | |
2153 | else | |
2154 | { | |
2155 | unsigned int val, type, reg; | |
2156 | ||
2157 | /* IE->LE transition: | |
2158 | Originally it can be one of: | |
2159 | movq foo@gottpoff(%rip), %reg | |
2160 | addq foo@gottpoff(%rip), %reg | |
2161 | We change it into: | |
2162 | movq $foo, %reg | |
2163 | leaq foo(%reg), %reg | |
2164 | addq $foo, %reg. */ | |
2165 | BFD_ASSERT (rel->r_offset >= 3); | |
2166 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 3); | |
2167 | BFD_ASSERT (val == 0x48 || val == 0x4c); | |
2168 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); | |
2169 | BFD_ASSERT (type == 0x8b || type == 0x03); | |
2170 | reg = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); | |
2171 | BFD_ASSERT ((reg & 0xc7) == 5); | |
2172 | reg >>= 3; | |
2173 | BFD_ASSERT (rel->r_offset + 4 <= input_section->_raw_size); | |
2174 | if (type == 0x8b) | |
2175 | { | |
2176 | /* movq */ | |
2177 | if (val == 0x4c) | |
2178 | bfd_put_8 (output_bfd, 0x49, | |
2179 | contents + rel->r_offset - 3); | |
2180 | bfd_put_8 (output_bfd, 0xc7, | |
2181 | contents + rel->r_offset - 2); | |
2182 | bfd_put_8 (output_bfd, 0xc0 | reg, | |
2183 | contents + rel->r_offset - 1); | |
2184 | } | |
2185 | else if (reg == 4) | |
2186 | { | |
2187 | /* addq -> addq - addressing with %rsp/%r12 is | |
2188 | special */ | |
2189 | if (val == 0x4c) | |
2190 | bfd_put_8 (output_bfd, 0x49, | |
2191 | contents + rel->r_offset - 3); | |
2192 | bfd_put_8 (output_bfd, 0x81, | |
2193 | contents + rel->r_offset - 2); | |
2194 | bfd_put_8 (output_bfd, 0xc0 | reg, | |
2195 | contents + rel->r_offset - 1); | |
2196 | } | |
2197 | else | |
2198 | { | |
2199 | /* addq -> leaq */ | |
2200 | if (val == 0x4c) | |
2201 | bfd_put_8 (output_bfd, 0x4d, | |
2202 | contents + rel->r_offset - 3); | |
2203 | bfd_put_8 (output_bfd, 0x8d, | |
2204 | contents + rel->r_offset - 2); | |
2205 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), | |
2206 | contents + rel->r_offset - 1); | |
2207 | } | |
2208 | bfd_put_32 (output_bfd, tpoff (info, relocation), | |
2209 | contents + rel->r_offset); | |
2210 | continue; | |
2211 | } | |
2212 | } | |
2213 | ||
2214 | if (htab->sgot == NULL) | |
2215 | abort (); | |
2216 | ||
2217 | if (h != NULL) | |
2218 | off = h->got.offset; | |
2219 | else | |
2220 | { | |
2221 | if (local_got_offsets == NULL) | |
2222 | abort (); | |
2223 | ||
2224 | off = local_got_offsets[r_symndx]; | |
2225 | } | |
2226 | ||
2227 | if ((off & 1) != 0) | |
2228 | off &= ~1; | |
26e41594 | 2229 | else |
bffbf940 JJ |
2230 | { |
2231 | Elf_Internal_Rela outrel; | |
947216bf | 2232 | bfd_byte *loc; |
bffbf940 JJ |
2233 | int dr_type, indx; |
2234 | ||
2235 | if (htab->srelgot == NULL) | |
2236 | abort (); | |
2237 | ||
2238 | outrel.r_offset = (htab->sgot->output_section->vma | |
2239 | + htab->sgot->output_offset + off); | |
2240 | ||
2241 | indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
2242 | if (r_type == R_X86_64_TLSGD) | |
2243 | dr_type = R_X86_64_DTPMOD64; | |
2244 | else | |
2245 | dr_type = R_X86_64_TPOFF64; | |
2246 | ||
2247 | bfd_put_64 (output_bfd, 0, htab->sgot->contents + off); | |
2248 | outrel.r_addend = 0; | |
2249 | if (dr_type == R_X86_64_TPOFF64 && indx == 0) | |
2250 | outrel.r_addend = relocation - dtpoff_base (info); | |
2251 | outrel.r_info = ELF64_R_INFO (indx, dr_type); | |
2252 | ||
947216bf AM |
2253 | loc = htab->srelgot->contents; |
2254 | loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela); | |
bffbf940 JJ |
2255 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
2256 | ||
2257 | if (r_type == R_X86_64_TLSGD) | |
2258 | { | |
2259 | if (indx == 0) | |
2260 | { | |
d40d037c | 2261 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 JJ |
2262 | bfd_put_64 (output_bfd, |
2263 | relocation - dtpoff_base (info), | |
2264 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2265 | } | |
2266 | else | |
2267 | { | |
2268 | bfd_put_64 (output_bfd, 0, | |
2269 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2270 | outrel.r_info = ELF64_R_INFO (indx, | |
2271 | R_X86_64_DTPOFF64); | |
2272 | outrel.r_offset += GOT_ENTRY_SIZE; | |
2273 | htab->srelgot->reloc_count++; | |
947216bf AM |
2274 | loc += sizeof (Elf64_External_Rela); |
2275 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
bffbf940 JJ |
2276 | } |
2277 | } | |
2278 | ||
2279 | if (h != NULL) | |
2280 | h->got.offset |= 1; | |
2281 | else | |
2282 | local_got_offsets[r_symndx] |= 1; | |
2283 | } | |
2284 | ||
2285 | if (off >= (bfd_vma) -2) | |
2286 | abort (); | |
2287 | if (r_type == ELF64_R_TYPE (rel->r_info)) | |
2288 | { | |
2289 | relocation = htab->sgot->output_section->vma | |
2290 | + htab->sgot->output_offset + off; | |
b34976b6 | 2291 | unresolved_reloc = FALSE; |
bffbf940 JJ |
2292 | } |
2293 | else | |
2294 | { | |
2295 | unsigned int i; | |
abcf1d52 JJ |
2296 | static unsigned char tlsgd[8] |
2297 | = { 0x66, 0x48, 0x8d, 0x3d, 0x66, 0x66, 0x48, 0xe8 }; | |
bffbf940 JJ |
2298 | |
2299 | /* GD->IE transition. | |
abcf1d52 JJ |
2300 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
2301 | .word 0x6666; rex64; call __tls_get_addr@plt | |
bffbf940 JJ |
2302 | Change it into: |
2303 | movq %fs:0, %rax | |
2304 | addq foo@gottpoff(%rip), %rax */ | |
abcf1d52 JJ |
2305 | BFD_ASSERT (rel->r_offset >= 4); |
2306 | for (i = 0; i < 4; i++) | |
26e41594 | 2307 | BFD_ASSERT (bfd_get_8 (input_bfd, |
abcf1d52 | 2308 | contents + rel->r_offset - 4 + i) |
bffbf940 | 2309 | == tlsgd[i]); |
abcf1d52 JJ |
2310 | BFD_ASSERT (rel->r_offset + 12 <= input_section->_raw_size); |
2311 | for (i = 0; i < 4; i++) | |
26e41594 | 2312 | BFD_ASSERT (bfd_get_8 (input_bfd, |
abcf1d52 JJ |
2313 | contents + rel->r_offset + 4 + i) |
2314 | == tlsgd[i+4]); | |
bffbf940 JJ |
2315 | BFD_ASSERT (rel + 1 < relend); |
2316 | BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); | |
abcf1d52 | 2317 | memcpy (contents + rel->r_offset - 4, |
bffbf940 JJ |
2318 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", |
2319 | 16); | |
2320 | ||
2321 | relocation = (htab->sgot->output_section->vma | |
2322 | + htab->sgot->output_offset + off | |
2323 | - rel->r_offset | |
2324 | - input_section->output_section->vma | |
2325 | - input_section->output_offset | |
abcf1d52 | 2326 | - 12); |
bffbf940 | 2327 | bfd_put_32 (output_bfd, relocation, |
abcf1d52 | 2328 | contents + rel->r_offset + 8); |
bffbf940 JJ |
2329 | /* Skip R_X86_64_PLT32. */ |
2330 | rel++; | |
2331 | continue; | |
2332 | } | |
2333 | break; | |
2334 | ||
2335 | case R_X86_64_TLSLD: | |
2336 | if (! info->shared) | |
2337 | { | |
2338 | /* LD->LE transition: | |
2339 | Ensure it is: | |
2340 | leaq foo@tlsld(%rip), %rdi; call __tls_get_addr@plt. | |
2341 | We change it into: | |
2342 | .word 0x6666; .byte 0x66; movl %fs:0, %rax. */ | |
2343 | BFD_ASSERT (rel->r_offset >= 3); | |
2344 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 3) | |
2345 | == 0x48); | |
2346 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 2) | |
2347 | == 0x8d); | |
2348 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 1) | |
2349 | == 0x3d); | |
2350 | BFD_ASSERT (rel->r_offset + 9 <= input_section->_raw_size); | |
2351 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4) | |
2352 | == 0xe8); | |
2353 | BFD_ASSERT (rel + 1 < relend); | |
2354 | BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); | |
2355 | memcpy (contents + rel->r_offset - 3, | |
2356 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
2357 | /* Skip R_X86_64_PLT32. */ | |
2358 | rel++; | |
2359 | continue; | |
2360 | } | |
2361 | ||
2362 | if (htab->sgot == NULL) | |
2363 | abort (); | |
2364 | ||
2365 | off = htab->tls_ld_got.offset; | |
2366 | if (off & 1) | |
2367 | off &= ~1; | |
2368 | else | |
2369 | { | |
2370 | Elf_Internal_Rela outrel; | |
947216bf | 2371 | bfd_byte *loc; |
bffbf940 JJ |
2372 | |
2373 | if (htab->srelgot == NULL) | |
2374 | abort (); | |
2375 | ||
2376 | outrel.r_offset = (htab->sgot->output_section->vma | |
2377 | + htab->sgot->output_offset + off); | |
2378 | ||
2379 | bfd_put_64 (output_bfd, 0, | |
2380 | htab->sgot->contents + off); | |
2381 | bfd_put_64 (output_bfd, 0, | |
2382 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2383 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_DTPMOD64); | |
2384 | outrel.r_addend = 0; | |
947216bf AM |
2385 | loc = htab->srelgot->contents; |
2386 | loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela); | |
bffbf940 JJ |
2387 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
2388 | htab->tls_ld_got.offset |= 1; | |
2389 | } | |
2390 | relocation = htab->sgot->output_section->vma | |
2391 | + htab->sgot->output_offset + off; | |
b34976b6 | 2392 | unresolved_reloc = FALSE; |
bffbf940 JJ |
2393 | break; |
2394 | ||
2395 | case R_X86_64_DTPOFF32: | |
a45bb67d | 2396 | if (info->shared || (input_section->flags & SEC_CODE) == 0) |
bffbf940 JJ |
2397 | relocation -= dtpoff_base (info); |
2398 | else | |
2399 | relocation = tpoff (info, relocation); | |
2400 | break; | |
2401 | ||
2402 | case R_X86_64_TPOFF32: | |
2403 | BFD_ASSERT (! info->shared); | |
2404 | relocation = tpoff (info, relocation); | |
2405 | break; | |
2406 | ||
70256ad8 AJ |
2407 | default: |
2408 | break; | |
2409 | } | |
8d88c4ca | 2410 | |
239e1f3a AM |
2411 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
2412 | because such sections are not SEC_ALLOC and thus ld.so will | |
2413 | not process them. */ | |
c434dee6 | 2414 | if (unresolved_reloc |
239e1f3a | 2415 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
c434dee6 AJ |
2416 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) |
2417 | (*_bfd_error_handler) | |
2418 | (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"), | |
2419 | bfd_archive_filename (input_bfd), | |
2420 | bfd_get_section_name (input_bfd, input_section), | |
2421 | (long) rel->r_offset, | |
2422 | h->root.root.string); | |
2423 | ||
8d88c4ca | 2424 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
2425 | contents, rel->r_offset, |
2426 | relocation, rel->r_addend); | |
8d88c4ca NC |
2427 | |
2428 | if (r != bfd_reloc_ok) | |
8da6118f | 2429 | { |
c434dee6 AJ |
2430 | const char *name; |
2431 | ||
2432 | if (h != NULL) | |
2433 | name = h->root.root.string; | |
2434 | else | |
8da6118f | 2435 | { |
c434dee6 AJ |
2436 | name = bfd_elf_string_from_elf_section (input_bfd, |
2437 | symtab_hdr->sh_link, | |
2438 | sym->st_name); | |
2439 | if (name == NULL) | |
b34976b6 | 2440 | return FALSE; |
c434dee6 AJ |
2441 | if (*name == '\0') |
2442 | name = bfd_section_name (input_bfd, sec); | |
2443 | } | |
2444 | ||
2445 | if (r == bfd_reloc_overflow) | |
2446 | { | |
2447 | ||
2448 | if (! ((*info->callbacks->reloc_overflow) | |
2449 | (info, name, howto->name, (bfd_vma) 0, | |
2450 | input_bfd, input_section, rel->r_offset))) | |
b34976b6 | 2451 | return FALSE; |
c434dee6 AJ |
2452 | } |
2453 | else | |
2454 | { | |
2455 | (*_bfd_error_handler) | |
2456 | (_("%s(%s+0x%lx): reloc against `%s': error %d"), | |
2457 | bfd_archive_filename (input_bfd), | |
2458 | bfd_get_section_name (input_bfd, input_section), | |
2459 | (long) rel->r_offset, name, (int) r); | |
b34976b6 | 2460 | return FALSE; |
8da6118f KH |
2461 | } |
2462 | } | |
8d88c4ca | 2463 | } |
70256ad8 | 2464 | |
b34976b6 | 2465 | return TRUE; |
70256ad8 AJ |
2466 | } |
2467 | ||
2468 | /* Finish up dynamic symbol handling. We set the contents of various | |
2469 | dynamic sections here. */ | |
2470 | ||
b34976b6 | 2471 | static bfd_boolean |
27482721 AJ |
2472 | elf64_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
2473 | struct bfd_link_info *info, | |
2474 | struct elf_link_hash_entry *h, | |
2475 | Elf_Internal_Sym *sym) | |
70256ad8 | 2476 | { |
c434dee6 | 2477 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 | 2478 | |
c434dee6 | 2479 | htab = elf64_x86_64_hash_table (info); |
70256ad8 AJ |
2480 | |
2481 | if (h->plt.offset != (bfd_vma) -1) | |
2482 | { | |
70256ad8 AJ |
2483 | bfd_vma plt_index; |
2484 | bfd_vma got_offset; | |
2485 | Elf_Internal_Rela rela; | |
947216bf | 2486 | bfd_byte *loc; |
70256ad8 AJ |
2487 | |
2488 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 2489 | it up. */ |
c434dee6 AJ |
2490 | if (h->dynindx == -1 |
2491 | || htab->splt == NULL | |
2492 | || htab->sgotplt == NULL | |
2493 | || htab->srelplt == NULL) | |
2494 | abort (); | |
70256ad8 AJ |
2495 | |
2496 | /* Get the index in the procedure linkage table which | |
2497 | corresponds to this symbol. This is the index of this symbol | |
2498 | in all the symbols for which we are making plt entries. The | |
2499 | first entry in the procedure linkage table is reserved. */ | |
2500 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
2501 | ||
2502 | /* Get the offset into the .got table of the entry that | |
407443a3 | 2503 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
fe4770f4 | 2504 | bytes. The first three are reserved for the dynamic linker. */ |
70256ad8 AJ |
2505 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; |
2506 | ||
2507 | /* Fill in the entry in the procedure linkage table. */ | |
c434dee6 | 2508 | memcpy (htab->splt->contents + h->plt.offset, elf64_x86_64_plt_entry, |
70256ad8 AJ |
2509 | PLT_ENTRY_SIZE); |
2510 | ||
2511 | /* Insert the relocation positions of the plt section. The magic | |
2512 | numbers at the end of the statements are the positions of the | |
2513 | relocations in the plt section. */ | |
653165cc AJ |
2514 | /* Put offset for jmp *name@GOTPCREL(%rip), since the |
2515 | instruction uses 6 bytes, subtract this value. */ | |
2516 | bfd_put_32 (output_bfd, | |
c434dee6 AJ |
2517 | (htab->sgotplt->output_section->vma |
2518 | + htab->sgotplt->output_offset | |
653165cc | 2519 | + got_offset |
c434dee6 AJ |
2520 | - htab->splt->output_section->vma |
2521 | - htab->splt->output_offset | |
653165cc AJ |
2522 | - h->plt.offset |
2523 | - 6), | |
c434dee6 | 2524 | htab->splt->contents + h->plt.offset + 2); |
653165cc AJ |
2525 | /* Put relocation index. */ |
2526 | bfd_put_32 (output_bfd, plt_index, | |
c434dee6 | 2527 | htab->splt->contents + h->plt.offset + 7); |
653165cc AJ |
2528 | /* Put offset for jmp .PLT0. */ |
2529 | bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE), | |
c434dee6 | 2530 | htab->splt->contents + h->plt.offset + 12); |
70256ad8 | 2531 | |
653165cc AJ |
2532 | /* Fill in the entry in the global offset table, initially this |
2533 | points to the pushq instruction in the PLT which is at offset 6. */ | |
c434dee6 AJ |
2534 | bfd_put_64 (output_bfd, (htab->splt->output_section->vma |
2535 | + htab->splt->output_offset | |
70256ad8 | 2536 | + h->plt.offset + 6), |
c434dee6 | 2537 | htab->sgotplt->contents + got_offset); |
70256ad8 AJ |
2538 | |
2539 | /* Fill in the entry in the .rela.plt section. */ | |
c434dee6 AJ |
2540 | rela.r_offset = (htab->sgotplt->output_section->vma |
2541 | + htab->sgotplt->output_offset | |
70256ad8 AJ |
2542 | + got_offset); |
2543 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_JUMP_SLOT); | |
2544 | rela.r_addend = 0; | |
947216bf | 2545 | loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela); |
c434dee6 | 2546 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
70256ad8 AJ |
2547 | |
2548 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2549 | { | |
2550 | /* Mark the symbol as undefined, rather than as defined in | |
c434dee6 AJ |
2551 | the .plt section. Leave the value alone. This is a clue |
2552 | for the dynamic linker, to make function pointer | |
2553 | comparisons work between an application and shared | |
2554 | library. */ | |
70256ad8 AJ |
2555 | sym->st_shndx = SHN_UNDEF; |
2556 | } | |
2557 | } | |
2558 | ||
bffbf940 JJ |
2559 | if (h->got.offset != (bfd_vma) -1 |
2560 | && elf64_x86_64_hash_entry (h)->tls_type != GOT_TLS_GD | |
2561 | && elf64_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE) | |
053579d7 | 2562 | { |
053579d7 | 2563 | Elf_Internal_Rela rela; |
947216bf | 2564 | bfd_byte *loc; |
053579d7 AJ |
2565 | |
2566 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 2567 | up. */ |
c434dee6 AJ |
2568 | if (htab->sgot == NULL || htab->srelgot == NULL) |
2569 | abort (); | |
053579d7 | 2570 | |
c434dee6 AJ |
2571 | rela.r_offset = (htab->sgot->output_section->vma |
2572 | + htab->sgot->output_offset | |
dc810e39 | 2573 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
2574 | |
2575 | /* If this is a static link, or it is a -Bsymbolic link and the | |
2576 | symbol is defined locally or was forced to be local because | |
2577 | of a version file, we just want to emit a RELATIVE reloc. | |
2578 | The entry in the global offset table will already have been | |
2579 | initialized in the relocate_section function. */ | |
c434dee6 | 2580 | if (info->shared |
27482721 | 2581 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
053579d7 | 2582 | { |
cc78d0af | 2583 | BFD_ASSERT((h->got.offset & 1) != 0); |
053579d7 AJ |
2584 | rela.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); |
2585 | rela.r_addend = (h->root.u.def.value | |
2586 | + h->root.u.def.section->output_section->vma | |
2587 | + h->root.u.def.section->output_offset); | |
2588 | } | |
2589 | else | |
2590 | { | |
2591 | BFD_ASSERT((h->got.offset & 1) == 0); | |
c434dee6 AJ |
2592 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
2593 | htab->sgot->contents + h->got.offset); | |
053579d7 AJ |
2594 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_GLOB_DAT); |
2595 | rela.r_addend = 0; | |
2596 | } | |
2597 | ||
947216bf AM |
2598 | loc = htab->srelgot->contents; |
2599 | loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 2600 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
053579d7 AJ |
2601 | } |
2602 | ||
70256ad8 AJ |
2603 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) |
2604 | { | |
70256ad8 | 2605 | Elf_Internal_Rela rela; |
947216bf | 2606 | bfd_byte *loc; |
70256ad8 AJ |
2607 | |
2608 | /* This symbol needs a copy reloc. Set it up. */ | |
2609 | ||
c434dee6 AJ |
2610 | if (h->dynindx == -1 |
2611 | || (h->root.type != bfd_link_hash_defined | |
2612 | && h->root.type != bfd_link_hash_defweak) | |
2613 | || htab->srelbss == NULL) | |
2614 | abort (); | |
70256ad8 AJ |
2615 | |
2616 | rela.r_offset = (h->root.u.def.value | |
2617 | + h->root.u.def.section->output_section->vma | |
2618 | + h->root.u.def.section->output_offset); | |
2619 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_COPY); | |
2620 | rela.r_addend = 0; | |
947216bf AM |
2621 | loc = htab->srelbss->contents; |
2622 | loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 2623 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
70256ad8 AJ |
2624 | } |
2625 | ||
2626 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
2627 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
2628 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
2629 | sym->st_shndx = SHN_ABS; | |
2630 | ||
b34976b6 | 2631 | return TRUE; |
70256ad8 AJ |
2632 | } |
2633 | ||
c434dee6 AJ |
2634 | /* Used to decide how to sort relocs in an optimal manner for the |
2635 | dynamic linker, before writing them out. */ | |
2636 | ||
2637 | static enum elf_reloc_type_class | |
27482721 | 2638 | elf64_x86_64_reloc_type_class (const Elf_Internal_Rela *rela) |
c434dee6 AJ |
2639 | { |
2640 | switch ((int) ELF64_R_TYPE (rela->r_info)) | |
2641 | { | |
2642 | case R_X86_64_RELATIVE: | |
2643 | return reloc_class_relative; | |
2644 | case R_X86_64_JUMP_SLOT: | |
2645 | return reloc_class_plt; | |
2646 | case R_X86_64_COPY: | |
2647 | return reloc_class_copy; | |
2648 | default: | |
2649 | return reloc_class_normal; | |
2650 | } | |
2651 | } | |
2652 | ||
70256ad8 AJ |
2653 | /* Finish up the dynamic sections. */ |
2654 | ||
b34976b6 | 2655 | static bfd_boolean |
27482721 | 2656 | elf64_x86_64_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) |
70256ad8 | 2657 | { |
c434dee6 | 2658 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
2659 | bfd *dynobj; |
2660 | asection *sdyn; | |
70256ad8 | 2661 | |
c434dee6 AJ |
2662 | htab = elf64_x86_64_hash_table (info); |
2663 | dynobj = htab->elf.dynobj; | |
70256ad8 AJ |
2664 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
2665 | ||
c434dee6 | 2666 | if (htab->elf.dynamic_sections_created) |
70256ad8 | 2667 | { |
70256ad8 AJ |
2668 | Elf64_External_Dyn *dyncon, *dynconend; |
2669 | ||
c434dee6 AJ |
2670 | if (sdyn == NULL || htab->sgot == NULL) |
2671 | abort (); | |
70256ad8 AJ |
2672 | |
2673 | dyncon = (Elf64_External_Dyn *) sdyn->contents; | |
2674 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
2675 | for (; dyncon < dynconend; dyncon++) | |
2676 | { | |
2677 | Elf_Internal_Dyn dyn; | |
70256ad8 AJ |
2678 | asection *s; |
2679 | ||
2680 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); | |
2681 | ||
2682 | switch (dyn.d_tag) | |
2683 | { | |
2684 | default: | |
053579d7 | 2685 | continue; |
70256ad8 AJ |
2686 | |
2687 | case DT_PLTGOT: | |
c434dee6 AJ |
2688 | dyn.d_un.d_ptr = htab->sgot->output_section->vma; |
2689 | break; | |
70256ad8 AJ |
2690 | |
2691 | case DT_JMPREL: | |
c434dee6 AJ |
2692 | dyn.d_un.d_ptr = htab->srelplt->output_section->vma; |
2693 | break; | |
70256ad8 | 2694 | |
c434dee6 AJ |
2695 | case DT_PLTRELSZ: |
2696 | s = htab->srelplt->output_section; | |
2697 | if (s->_cooked_size != 0) | |
2698 | dyn.d_un.d_val = s->_cooked_size; | |
2699 | else | |
2700 | dyn.d_un.d_val = s->_raw_size; | |
70256ad8 AJ |
2701 | break; |
2702 | ||
2703 | case DT_RELASZ: | |
c434dee6 AJ |
2704 | /* The procedure linkage table relocs (DT_JMPREL) should |
2705 | not be included in the overall relocs (DT_RELA). | |
2706 | Therefore, we override the DT_RELASZ entry here to | |
2707 | make it not include the JMPREL relocs. Since the | |
2708 | linker script arranges for .rela.plt to follow all | |
2709 | other relocation sections, we don't have to worry | |
2710 | about changing the DT_RELA entry. */ | |
2711 | if (htab->srelplt != NULL) | |
70256ad8 | 2712 | { |
c434dee6 AJ |
2713 | s = htab->srelplt->output_section; |
2714 | if (s->_cooked_size != 0) | |
2715 | dyn.d_un.d_val -= s->_cooked_size; | |
2716 | else | |
2717 | dyn.d_un.d_val -= s->_raw_size; | |
70256ad8 AJ |
2718 | } |
2719 | break; | |
70256ad8 | 2720 | } |
c434dee6 | 2721 | |
70256ad8 AJ |
2722 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
2723 | } | |
2724 | ||
c434dee6 AJ |
2725 | /* Fill in the special first entry in the procedure linkage table. */ |
2726 | if (htab->splt && htab->splt->_raw_size > 0) | |
70256ad8 | 2727 | { |
653165cc | 2728 | /* Fill in the first entry in the procedure linkage table. */ |
c434dee6 AJ |
2729 | memcpy (htab->splt->contents, elf64_x86_64_plt0_entry, |
2730 | PLT_ENTRY_SIZE); | |
653165cc AJ |
2731 | /* Add offset for pushq GOT+8(%rip), since the instruction |
2732 | uses 6 bytes subtract this value. */ | |
2733 | bfd_put_32 (output_bfd, | |
c434dee6 AJ |
2734 | (htab->sgotplt->output_section->vma |
2735 | + htab->sgotplt->output_offset | |
653165cc | 2736 | + 8 |
c434dee6 AJ |
2737 | - htab->splt->output_section->vma |
2738 | - htab->splt->output_offset | |
653165cc | 2739 | - 6), |
c434dee6 | 2740 | htab->splt->contents + 2); |
653165cc AJ |
2741 | /* Add offset for jmp *GOT+16(%rip). The 12 is the offset to |
2742 | the end of the instruction. */ | |
2743 | bfd_put_32 (output_bfd, | |
c434dee6 AJ |
2744 | (htab->sgotplt->output_section->vma |
2745 | + htab->sgotplt->output_offset | |
653165cc | 2746 | + 16 |
c434dee6 AJ |
2747 | - htab->splt->output_section->vma |
2748 | - htab->splt->output_offset | |
653165cc | 2749 | - 12), |
c434dee6 | 2750 | htab->splt->contents + 8); |
653165cc | 2751 | |
c434dee6 AJ |
2752 | elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize = |
2753 | PLT_ENTRY_SIZE; | |
70256ad8 | 2754 | } |
70256ad8 AJ |
2755 | } |
2756 | ||
c434dee6 | 2757 | if (htab->sgotplt) |
70256ad8 | 2758 | { |
c434dee6 AJ |
2759 | /* Fill in the first three entries in the global offset table. */ |
2760 | if (htab->sgotplt->_raw_size > 0) | |
2761 | { | |
2762 | /* Set the first entry in the global offset table to the address of | |
2763 | the dynamic section. */ | |
2764 | if (sdyn == NULL) | |
2765 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents); | |
2766 | else | |
2767 | bfd_put_64 (output_bfd, | |
2768 | sdyn->output_section->vma + sdyn->output_offset, | |
2769 | htab->sgotplt->contents); | |
2770 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ | |
2771 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + GOT_ENTRY_SIZE); | |
2772 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + GOT_ENTRY_SIZE*2); | |
2773 | } | |
70256ad8 | 2774 | |
c434dee6 AJ |
2775 | elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize = |
2776 | GOT_ENTRY_SIZE; | |
2777 | } | |
70256ad8 | 2778 | |
b34976b6 | 2779 | return TRUE; |
8d88c4ca NC |
2780 | } |
2781 | ||
8df9fc9d | 2782 | |
70256ad8 AJ |
2783 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec |
2784 | #define TARGET_LITTLE_NAME "elf64-x86-64" | |
2785 | #define ELF_ARCH bfd_arch_i386 | |
2786 | #define ELF_MACHINE_CODE EM_X86_64 | |
2787 | #define ELF_MAXPAGESIZE 0x100000 | |
2788 | ||
2789 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 2790 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
2791 | #define elf_backend_want_got_plt 1 |
2792 | #define elf_backend_plt_readonly 1 | |
2793 | #define elf_backend_want_plt_sym 0 | |
2794 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
2795 | #define elf_backend_plt_header_size PLT_ENTRY_SIZE | |
b491616a | 2796 | #define elf_backend_rela_normal 1 |
70256ad8 AJ |
2797 | |
2798 | #define elf_info_to_howto elf64_x86_64_info_to_howto | |
70256ad8 | 2799 | |
70256ad8 AJ |
2800 | #define bfd_elf64_bfd_link_hash_table_create \ |
2801 | elf64_x86_64_link_hash_table_create | |
407443a3 | 2802 | #define bfd_elf64_bfd_reloc_type_lookup elf64_x86_64_reloc_type_lookup |
70256ad8 AJ |
2803 | |
2804 | #define elf_backend_adjust_dynamic_symbol elf64_x86_64_adjust_dynamic_symbol | |
2805 | #define elf_backend_check_relocs elf64_x86_64_check_relocs | |
c434dee6 AJ |
2806 | #define elf_backend_copy_indirect_symbol elf64_x86_64_copy_indirect_symbol |
2807 | #define elf_backend_create_dynamic_sections elf64_x86_64_create_dynamic_sections | |
2808 | #define elf_backend_finish_dynamic_sections elf64_x86_64_finish_dynamic_sections | |
70256ad8 AJ |
2809 | #define elf_backend_finish_dynamic_symbol elf64_x86_64_finish_dynamic_symbol |
2810 | #define elf_backend_gc_mark_hook elf64_x86_64_gc_mark_hook | |
2811 | #define elf_backend_gc_sweep_hook elf64_x86_64_gc_sweep_hook | |
3bab7989 ML |
2812 | #define elf_backend_grok_prstatus elf64_x86_64_grok_prstatus |
2813 | #define elf_backend_grok_psinfo elf64_x86_64_grok_psinfo | |
c434dee6 | 2814 | #define elf_backend_reloc_type_class elf64_x86_64_reloc_type_class |
70256ad8 AJ |
2815 | #define elf_backend_relocate_section elf64_x86_64_relocate_section |
2816 | #define elf_backend_size_dynamic_sections elf64_x86_64_size_dynamic_sections | |
407443a3 | 2817 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
bffbf940 | 2818 | #define bfd_elf64_mkobject elf64_x86_64_mkobject |
8d88c4ca NC |
2819 | |
2820 | #include "elf64-target.h" |