Commit | Line | Data |
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8d88c4ca | 1 | /* X86-64 specific support for 64-bit ELF |
70256ad8 | 2 | Copyright 2000, 2001 Free Software Foundation, Inc. |
8d88c4ca NC |
3 | Contributed by Jan Hubicka <jh@suse.cz>. |
4 | ||
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
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. | |
11 | ||
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. | |
16 | ||
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. */ | |
20 | ||
21 | #include "bfd.h" | |
22 | #include "sysdep.h" | |
23 | #include "libbfd.h" | |
24 | #include "elf-bfd.h" | |
25 | ||
26 | #include "elf/x86-64.h" | |
27 | ||
28 | /* We use only the RELA entries. */ | |
29 | #define USE_RELA | |
30 | ||
31 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ | |
32 | #define MINUS_ONE (~ (bfd_vma) 0) | |
33 | ||
34 | /* The relocation "howto" table. Order of fields: | |
407443a3 AJ |
35 | type, size, bitsize, pc_relative, complain_on_overflow, |
36 | special_function, name, partial_inplace, src_mask, dst_pack, pcrel_offset. */ | |
70256ad8 AJ |
37 | static reloc_howto_type x86_64_elf_howto_table[] = |
38 | { | |
407443a3 | 39 | HOWTO(R_X86_64_NONE, 0, 0, 0, false, 0, complain_overflow_dont, |
fe4770f4 AJ |
40 | bfd_elf_generic_reloc, "R_X86_64_NONE", false, 0x00000000, 0x00000000, |
41 | false), | |
407443a3 | 42 | HOWTO(R_X86_64_64, 0, 4, 64, false, 0, complain_overflow_bitfield, |
fe4770f4 AJ |
43 | bfd_elf_generic_reloc, "R_X86_64_64", false, MINUS_ONE, MINUS_ONE, |
44 | false), | |
407443a3 | 45 | HOWTO(R_X86_64_PC32, 0, 4, 32, true, 0, complain_overflow_signed, |
fe4770f4 AJ |
46 | bfd_elf_generic_reloc, "R_X86_64_PC32", false, 0xffffffff, 0xffffffff, |
47 | true), | |
407443a3 | 48 | HOWTO(R_X86_64_GOT32, 0, 4, 32, false, 0, complain_overflow_signed, |
fe4770f4 AJ |
49 | bfd_elf_generic_reloc, "R_X86_64_GOT32", false, 0xffffffff, 0xffffffff, |
50 | false), | |
407443a3 | 51 | HOWTO(R_X86_64_PLT32, 0, 4, 32, true, 0, complain_overflow_signed, |
fe4770f4 AJ |
52 | bfd_elf_generic_reloc, "R_X86_64_PLT32", false, 0xffffffff, 0xffffffff, |
53 | true), | |
407443a3 | 54 | HOWTO(R_X86_64_COPY, 0, 4, 32, false, 0, complain_overflow_bitfield, |
fe4770f4 AJ |
55 | bfd_elf_generic_reloc, "R_X86_64_COPY", false, 0xffffffff, 0xffffffff, |
56 | false), | |
407443a3 | 57 | HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, false, 0, complain_overflow_bitfield, |
fe4770f4 AJ |
58 | bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", false, MINUS_ONE, |
59 | MINUS_ONE, false), | |
407443a3 | 60 | HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, false, 0, complain_overflow_bitfield, |
fe4770f4 AJ |
61 | bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", false, MINUS_ONE, |
62 | MINUS_ONE, false), | |
4a73f21b | 63 | HOWTO(R_X86_64_RELATIVE, 0, 4, 64, false, 0, complain_overflow_bitfield, |
fe4770f4 AJ |
64 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE", false, MINUS_ONE, |
65 | MINUS_ONE, false), | |
407443a3 | 66 | HOWTO(R_X86_64_GOTPCREL, 0, 4, 32, true,0 , complain_overflow_signed, |
fe4770f4 AJ |
67 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", false, 0xffffffff, |
68 | 0xffffffff, true), | |
407443a3 | 69 | HOWTO(R_X86_64_32, 0, 4, 32, false, 0, complain_overflow_unsigned, |
fe4770f4 AJ |
70 | bfd_elf_generic_reloc, "R_X86_64_32", false, 0xffffffff, 0xffffffff, |
71 | false), | |
407443a3 | 72 | HOWTO(R_X86_64_32S, 0, 4, 32, false, 0, complain_overflow_signed, |
fe4770f4 AJ |
73 | bfd_elf_generic_reloc, "R_X86_64_32S", false, 0xffffffff, 0xffffffff, |
74 | false), | |
407443a3 AJ |
75 | HOWTO(R_X86_64_16, 0, 1, 16, false, 0, complain_overflow_bitfield, |
76 | bfd_elf_generic_reloc, "R_X86_64_16", false, 0xffff, 0xffff, false), | |
77 | HOWTO(R_X86_64_PC16,0, 1, 16, true, 0, complain_overflow_bitfield, | |
78 | bfd_elf_generic_reloc, "R_X86_64_PC16", false, 0xffff, 0xffff, true), | |
79 | HOWTO(R_X86_64_8, 0, 0, 8, false, 0, complain_overflow_signed, | |
80 | bfd_elf_generic_reloc, "R_X86_64_8", false, 0xff, 0xff, false), | |
81 | HOWTO(R_X86_64_PC8, 0, 0, 8, true, 0, complain_overflow_signed, | |
fe4770f4 AJ |
82 | bfd_elf_generic_reloc, "R_X86_64_PC8", false, 0xff, 0xff, true), |
83 | ||
84 | /* GNU extension to record C++ vtable hierarchy. */ | |
85 | HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, false, 0, complain_overflow_dont, | |
86 | NULL, "R_X86_64_GNU_VTINHERIT", false, 0, 0, false), | |
87 | ||
88 | /* GNU extension to record C++ vtable member usage. */ | |
89 | HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, false, 0, complain_overflow_dont, | |
90 | _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", false, 0, 0, | |
91 | false) | |
8d88c4ca NC |
92 | }; |
93 | ||
94 | /* Map BFD relocs to the x86_64 elf relocs. */ | |
70256ad8 AJ |
95 | struct elf_reloc_map |
96 | { | |
8d88c4ca NC |
97 | bfd_reloc_code_real_type bfd_reloc_val; |
98 | unsigned char elf_reloc_val; | |
99 | }; | |
100 | ||
dc810e39 | 101 | static const struct elf_reloc_map x86_64_reloc_map[] = |
8d88c4ca | 102 | { |
70256ad8 AJ |
103 | { BFD_RELOC_NONE, R_X86_64_NONE, }, |
104 | { BFD_RELOC_64, R_X86_64_64, }, | |
105 | { BFD_RELOC_32_PCREL, R_X86_64_PC32, }, | |
106 | { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,}, | |
107 | { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,}, | |
108 | { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, }, | |
109 | { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, }, | |
110 | { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, }, | |
111 | { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, }, | |
112 | { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, }, | |
113 | { BFD_RELOC_32, R_X86_64_32, }, | |
114 | { BFD_RELOC_X86_64_32S, R_X86_64_32S, }, | |
115 | { BFD_RELOC_16, R_X86_64_16, }, | |
116 | { BFD_RELOC_16_PCREL, R_X86_64_PC16, }, | |
117 | { BFD_RELOC_8, R_X86_64_8, }, | |
118 | { BFD_RELOC_8_PCREL, R_X86_64_PC8, }, | |
fe4770f4 AJ |
119 | { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, }, |
120 | { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, }, | |
8d88c4ca NC |
121 | }; |
122 | ||
8d88c4ca NC |
123 | static reloc_howto_type *elf64_x86_64_reloc_type_lookup |
124 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
125 | static void elf64_x86_64_info_to_howto | |
126 | PARAMS ((bfd *, arelent *, Elf64_Internal_Rela *)); | |
127 | static struct bfd_link_hash_table *elf64_x86_64_link_hash_table_create | |
128 | PARAMS ((bfd *)); | |
1e1b3bc2 AJ |
129 | static boolean elf64_x86_64_elf_object_p PARAMS ((bfd *abfd)); |
130 | static boolean elf64_x86_64_check_relocs | |
131 | PARAMS ((bfd *, struct bfd_link_info *, asection *sec, | |
132 | const Elf_Internal_Rela *)); | |
133 | static asection *elf64_x86_64_gc_mark_hook | |
134 | PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *, | |
135 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); | |
136 | ||
137 | static boolean elf64_x86_64_gc_sweep_hook | |
138 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
139 | const Elf_Internal_Rela *)); | |
70256ad8 AJ |
140 | |
141 | static struct bfd_hash_entry *elf64_x86_64_link_hash_newfunc | |
142 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
143 | static boolean elf64_x86_64_adjust_dynamic_symbol | |
144 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
145 | ||
146 | static boolean elf64_x86_64_size_dynamic_sections | |
147 | PARAMS ((bfd *, struct bfd_link_info *)); | |
8d88c4ca NC |
148 | static boolean elf64_x86_64_relocate_section |
149 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
407443a3 | 150 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); |
70256ad8 AJ |
151 | static boolean elf64_x86_64_finish_dynamic_symbol |
152 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, | |
153 | Elf_Internal_Sym *sym)); | |
154 | static boolean elf64_x86_64_finish_dynamic_sections | |
155 | PARAMS ((bfd *, struct bfd_link_info *)); | |
f51e552e AM |
156 | static enum elf_reloc_type_class elf64_x86_64_reloc_type_class |
157 | PARAMS ((const Elf_Internal_Rela *)); | |
8d88c4ca NC |
158 | |
159 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
160 | static reloc_howto_type * | |
161 | elf64_x86_64_reloc_type_lookup (abfd, code) | |
162 | bfd *abfd ATTRIBUTE_UNUSED; | |
163 | bfd_reloc_code_real_type code; | |
164 | { | |
165 | unsigned int i; | |
166 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); | |
167 | i++) | |
168 | { | |
169 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
ffaef159 | 170 | return &x86_64_elf_howto_table[i]; |
8d88c4ca NC |
171 | } |
172 | return 0; | |
173 | } | |
174 | ||
8d88c4ca | 175 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
8da6118f | 176 | |
8d88c4ca NC |
177 | static void |
178 | elf64_x86_64_info_to_howto (abfd, cache_ptr, dst) | |
179 | bfd *abfd ATTRIBUTE_UNUSED; | |
180 | arelent *cache_ptr; | |
181 | Elf64_Internal_Rela *dst; | |
182 | { | |
fe4770f4 | 183 | unsigned r_type, i; |
8d88c4ca NC |
184 | |
185 | r_type = ELF64_R_TYPE (dst->r_info); | |
fe4770f4 AJ |
186 | if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT) |
187 | { | |
188 | BFD_ASSERT (r_type <= (unsigned int) R_X86_64_PC8); | |
189 | i = r_type; | |
190 | } | |
191 | else | |
192 | { | |
193 | BFD_ASSERT (r_type < (unsigned int) R_X86_64_max); | |
194 | i = r_type - ((unsigned int) R_X86_64_GNU_VTINHERIT - R_X86_64_PC8 - 1); | |
195 | } | |
196 | cache_ptr->howto = &x86_64_elf_howto_table[i]; | |
8d88c4ca NC |
197 | BFD_ASSERT (r_type == cache_ptr->howto->type); |
198 | } | |
70256ad8 | 199 | \f |
407443a3 | 200 | /* Functions for the x86-64 ELF linker. */ |
70256ad8 | 201 | |
407443a3 | 202 | /* The name of the dynamic interpreter. This is put in the .interp |
70256ad8 AJ |
203 | section. */ |
204 | ||
407443a3 | 205 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1" |
70256ad8 AJ |
206 | |
207 | /* The size in bytes of an entry in the global offset table. */ | |
208 | ||
209 | #define GOT_ENTRY_SIZE 8 | |
8d88c4ca | 210 | |
70256ad8 | 211 | /* The size in bytes of an entry in the procedure linkage table. */ |
8d88c4ca | 212 | |
70256ad8 AJ |
213 | #define PLT_ENTRY_SIZE 16 |
214 | ||
215 | /* The first entry in a procedure linkage table looks like this. See the | |
216 | SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */ | |
217 | ||
218 | static const bfd_byte elf64_x86_64_plt0_entry[PLT_ENTRY_SIZE] = | |
219 | { | |
653165cc AJ |
220 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
221 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
222 | 0x90, 0x90, 0x90, 0x90 /* pad out to 16 bytes with nops. */ | |
70256ad8 AJ |
223 | }; |
224 | ||
225 | /* Subsequent entries in a procedure linkage table look like this. */ | |
226 | ||
227 | static const bfd_byte elf64_x86_64_plt_entry[PLT_ENTRY_SIZE] = | |
228 | { | |
653165cc | 229 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 230 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 231 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
232 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
233 | 0xe9, /* jmp relative */ | |
234 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
235 | }; | |
236 | ||
237 | /* The x86-64 linker needs to keep track of the number of relocs that | |
407443a3 | 238 | it decides to copy in check_relocs for each symbol. This is so |
70256ad8 AJ |
239 | that it can discard PC relative relocs if it doesn't need them when |
240 | linking with -Bsymbolic. We store the information in a field | |
407443a3 | 241 | extending the regular ELF linker hash table. */ |
70256ad8 AJ |
242 | |
243 | /* This structure keeps track of the number of PC relative relocs we | |
244 | have copied for a given symbol. */ | |
245 | ||
246 | struct elf64_x86_64_pcrel_relocs_copied | |
247 | { | |
248 | /* Next section. */ | |
249 | struct elf64_x86_64_pcrel_relocs_copied *next; | |
250 | /* A section in dynobj. */ | |
251 | asection *section; | |
252 | /* Number of relocs copied in this section. */ | |
253 | bfd_size_type count; | |
254 | }; | |
255 | ||
256 | /* x86-64 ELF linker hash entry. */ | |
257 | ||
258 | struct elf64_x86_64_link_hash_entry | |
259 | { | |
260 | struct elf_link_hash_entry root; | |
261 | ||
262 | /* Number of PC relative relocs copied for this symbol. */ | |
263 | struct elf64_x86_64_pcrel_relocs_copied *pcrel_relocs_copied; | |
264 | }; | |
265 | ||
266 | /* x86-64 ELF linker hash table. */ | |
8d88c4ca | 267 | |
407443a3 AJ |
268 | struct elf64_x86_64_link_hash_table |
269 | { | |
8d88c4ca NC |
270 | struct elf_link_hash_table root; |
271 | }; | |
272 | ||
70256ad8 AJ |
273 | /* Declare this now that the above structures are defined. */ |
274 | ||
275 | static boolean elf64_x86_64_discard_copies | |
276 | PARAMS ((struct elf64_x86_64_link_hash_entry *, PTR)); | |
277 | ||
278 | /* Traverse an x86-64 ELF linker hash table. */ | |
279 | ||
280 | #define elf64_x86_64_link_hash_traverse(table, func, info) \ | |
281 | (elf_link_hash_traverse \ | |
282 | (&(table)->root, \ | |
283 | (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ | |
284 | (info))) | |
285 | ||
286 | /* Get the x86-64 ELF linker hash table from a link_info structure. */ | |
8d88c4ca NC |
287 | |
288 | #define elf64_x86_64_hash_table(p) \ | |
289 | ((struct elf64_x86_64_link_hash_table *) ((p)->hash)) | |
290 | ||
407443a3 | 291 | /* Create an entry in an x86-64 ELF linker hash table. */ |
70256ad8 AJ |
292 | |
293 | static struct bfd_hash_entry * | |
294 | elf64_x86_64_link_hash_newfunc (entry, table, string) | |
295 | struct bfd_hash_entry *entry; | |
296 | struct bfd_hash_table *table; | |
297 | const char *string; | |
298 | { | |
299 | struct elf64_x86_64_link_hash_entry *ret = | |
300 | (struct elf64_x86_64_link_hash_entry *) entry; | |
301 | ||
302 | /* Allocate the structure if it has not already been allocated by a | |
407443a3 | 303 | subclass. */ |
70256ad8 AJ |
304 | if (ret == (struct elf64_x86_64_link_hash_entry *) NULL) |
305 | ret = ((struct elf64_x86_64_link_hash_entry *) | |
306 | bfd_hash_allocate (table, | |
307 | sizeof (struct elf64_x86_64_link_hash_entry))); | |
308 | if (ret == (struct elf64_x86_64_link_hash_entry *) NULL) | |
309 | return (struct bfd_hash_entry *) ret; | |
310 | ||
311 | /* Call the allocation method of the superclass. */ | |
312 | ret = ((struct elf64_x86_64_link_hash_entry *) | |
313 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, | |
314 | table, string)); | |
315 | if (ret != (struct elf64_x86_64_link_hash_entry *) NULL) | |
316 | { | |
317 | ret->pcrel_relocs_copied = NULL; | |
318 | } | |
319 | ||
320 | return (struct bfd_hash_entry *) ret; | |
321 | } | |
322 | ||
8d88c4ca NC |
323 | /* Create an X86-64 ELF linker hash table. */ |
324 | ||
325 | static struct bfd_link_hash_table * | |
326 | elf64_x86_64_link_hash_table_create (abfd) | |
327 | bfd *abfd; | |
328 | { | |
329 | struct elf64_x86_64_link_hash_table *ret; | |
dc810e39 | 330 | bfd_size_type amt = sizeof (struct elf64_x86_64_link_hash_table); |
8d88c4ca | 331 | |
dc810e39 | 332 | ret = ((struct elf64_x86_64_link_hash_table *) bfd_alloc (abfd, amt)); |
8d88c4ca NC |
333 | if (ret == (struct elf64_x86_64_link_hash_table *) NULL) |
334 | return NULL; | |
335 | ||
336 | if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, | |
70256ad8 | 337 | elf64_x86_64_link_hash_newfunc)) |
8d88c4ca NC |
338 | { |
339 | bfd_release (abfd, ret); | |
340 | return NULL; | |
341 | } | |
342 | ||
343 | return &ret->root.root; | |
344 | } | |
345 | ||
1e1b3bc2 | 346 | static boolean |
8d88c4ca NC |
347 | elf64_x86_64_elf_object_p (abfd) |
348 | bfd *abfd; | |
349 | { | |
350 | /* Set the right machine number for an x86-64 elf64 file. */ | |
351 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
352 | return true; | |
353 | } | |
354 | ||
70256ad8 AJ |
355 | /* Look through the relocs for a section during the first phase, and |
356 | allocate space in the global offset table or procedure linkage | |
357 | table. */ | |
358 | ||
359 | static boolean | |
360 | elf64_x86_64_check_relocs (abfd, info, sec, relocs) | |
361 | bfd *abfd; | |
362 | struct bfd_link_info *info; | |
363 | asection *sec; | |
364 | const Elf_Internal_Rela *relocs; | |
365 | { | |
366 | bfd *dynobj; | |
367 | Elf_Internal_Shdr *symtab_hdr; | |
368 | struct elf_link_hash_entry **sym_hashes; | |
369 | bfd_signed_vma *local_got_refcounts; | |
370 | const Elf_Internal_Rela *rel; | |
371 | const Elf_Internal_Rela *rel_end; | |
372 | asection *sgot; | |
373 | asection *srelgot; | |
374 | asection *sreloc; | |
375 | ||
376 | if (info->relocateable) | |
377 | return true; | |
378 | ||
379 | dynobj = elf_hash_table (info)->dynobj; | |
380 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
381 | sym_hashes = elf_sym_hashes (abfd); | |
382 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
383 | ||
384 | sgot = srelgot = sreloc = NULL; | |
385 | rel_end = relocs + sec->reloc_count; | |
386 | for (rel = relocs; rel < rel_end; rel++) | |
387 | { | |
388 | unsigned long r_symndx; | |
389 | struct elf_link_hash_entry *h; | |
390 | ||
391 | r_symndx = ELF64_R_SYM (rel->r_info); | |
392 | if (r_symndx < symtab_hdr->sh_info) | |
393 | h = NULL; | |
394 | else | |
395 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
396 | ||
397 | /* Some relocs require a global offset table. */ | |
398 | if (dynobj == NULL) | |
399 | { | |
400 | switch (ELF64_R_TYPE (rel->r_info)) | |
401 | { | |
402 | case R_X86_64_GOT32: | |
403 | case R_X86_64_GOTPCREL: | |
404 | elf_hash_table (info)->dynobj = dynobj = abfd; | |
405 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
406 | return false; | |
407 | break; | |
408 | } | |
409 | } | |
410 | ||
411 | switch (ELF64_R_TYPE (rel->r_info)) | |
412 | { | |
51e0a107 | 413 | case R_X86_64_GOTPCREL: |
70256ad8 | 414 | case R_X86_64_GOT32: |
407443a3 | 415 | /* This symbol requires a global offset table entry. */ |
70256ad8 AJ |
416 | |
417 | if (sgot == NULL) | |
418 | { | |
419 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
420 | BFD_ASSERT (sgot != NULL); | |
421 | } | |
422 | ||
423 | if (srelgot == NULL && (h != NULL || info->shared)) | |
424 | { | |
425 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
426 | if (srelgot == NULL) | |
427 | { | |
428 | srelgot = bfd_make_section (dynobj, ".rela.got"); | |
429 | if (srelgot == NULL | |
430 | || ! bfd_set_section_flags (dynobj, srelgot, | |
431 | (SEC_ALLOC | |
432 | | SEC_LOAD | |
433 | | SEC_HAS_CONTENTS | |
434 | | SEC_IN_MEMORY | |
435 | | SEC_LINKER_CREATED | |
436 | | SEC_READONLY)) | |
51e0a107 | 437 | || ! bfd_set_section_alignment (dynobj, srelgot, 3)) |
70256ad8 AJ |
438 | return false; |
439 | } | |
440 | } | |
441 | ||
442 | if (h != NULL) | |
443 | { | |
51b64d56 | 444 | if (h->got.refcount == 0) |
70256ad8 | 445 | { |
70256ad8 AJ |
446 | /* Make sure this symbol is output as a dynamic symbol. */ |
447 | if (h->dynindx == -1) | |
448 | { | |
449 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) | |
450 | return false; | |
451 | } | |
452 | ||
453 | sgot->_raw_size += GOT_ENTRY_SIZE; | |
454 | srelgot->_raw_size += sizeof (Elf64_External_Rela); | |
455 | } | |
51b64d56 | 456 | h->got.refcount += 1; |
70256ad8 AJ |
457 | } |
458 | else | |
459 | { | |
460 | /* This is a global offset table entry for a local symbol. */ | |
461 | if (local_got_refcounts == NULL) | |
462 | { | |
dc810e39 | 463 | bfd_size_type size; |
70256ad8 | 464 | |
dc810e39 AM |
465 | size = symtab_hdr->sh_info; |
466 | size *= sizeof (bfd_signed_vma); | |
70256ad8 | 467 | local_got_refcounts = ((bfd_signed_vma *) |
51b64d56 | 468 | bfd_zalloc (abfd, size)); |
70256ad8 AJ |
469 | if (local_got_refcounts == NULL) |
470 | return false; | |
471 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
70256ad8 | 472 | } |
51b64d56 | 473 | if (local_got_refcounts[r_symndx] == 0) |
70256ad8 | 474 | { |
70256ad8 AJ |
475 | sgot->_raw_size += GOT_ENTRY_SIZE; |
476 | if (info->shared) | |
477 | { | |
478 | /* If we are generating a shared object, we need to | |
479 | output a R_X86_64_RELATIVE reloc so that the dynamic | |
480 | linker can adjust this GOT entry. */ | |
481 | srelgot->_raw_size += sizeof (Elf64_External_Rela); | |
482 | } | |
483 | } | |
51b64d56 | 484 | local_got_refcounts[r_symndx] += 1; |
70256ad8 AJ |
485 | } |
486 | break; | |
487 | ||
488 | case R_X86_64_PLT32: | |
489 | /* This symbol requires a procedure linkage table entry. We | |
407443a3 AJ |
490 | actually build the entry in adjust_dynamic_symbol, |
491 | because this might be a case of linking PIC code which is | |
492 | never referenced by a dynamic object, in which case we | |
493 | don't need to generate a procedure linkage table entry | |
494 | after all. */ | |
70256ad8 AJ |
495 | |
496 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 497 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
498 | if (h == NULL) |
499 | continue; | |
500 | ||
cc78d0af | 501 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
51b64d56 | 502 | h->plt.refcount += 1; |
70256ad8 AJ |
503 | break; |
504 | ||
cc78d0af AJ |
505 | case R_X86_64_8: |
506 | case R_X86_64_16: | |
70256ad8 | 507 | case R_X86_64_32: |
cc78d0af | 508 | case R_X86_64_64: |
70256ad8 AJ |
509 | case R_X86_64_32S: |
510 | case R_X86_64_PC32: | |
511 | if (h != NULL) | |
512 | h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; | |
513 | ||
514 | /* If we are creating a shared library, and this is a reloc | |
515 | against a global symbol, or a non PC relative reloc | |
516 | against a local symbol, then we need to copy the reloc | |
517 | into the shared library. However, if we are linking with | |
518 | -Bsymbolic, we do not need to copy a reloc against a | |
519 | global symbol which is defined in an object we are | |
407443a3 | 520 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
521 | this point we have not seen all the input files, so it is |
522 | possible that DEF_REGULAR is not set now but will be set | |
523 | later (it is never cleared). We account for that | |
524 | possibility below by storing information in the | |
525 | pcrel_relocs_copied field of the hash table entry. | |
526 | A similar situation occurs when creating shared libraries | |
527 | and symbol visibility changes render the symbol local. */ | |
528 | if (info->shared | |
529 | && (sec->flags & SEC_ALLOC) != 0 | |
cc78d0af AJ |
530 | && (((ELF64_R_TYPE (rel->r_info) != R_X86_64_PC8) |
531 | && (ELF64_R_TYPE (rel->r_info) != R_X86_64_PC16) | |
532 | && (ELF64_R_TYPE (rel->r_info) != R_X86_64_PC32)) | |
70256ad8 AJ |
533 | || (h != NULL |
534 | && (! info->symbolic | |
535 | || (h->elf_link_hash_flags | |
536 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
537 | { | |
538 | /* When creating a shared object, we must copy these | |
539 | reloc types into the output file. We create a reloc | |
540 | section in dynobj and make room for this reloc. */ | |
541 | if (sreloc == NULL) | |
542 | { | |
543 | const char *name; | |
544 | ||
545 | name = (bfd_elf_string_from_elf_section | |
546 | (abfd, | |
547 | elf_elfheader (abfd)->e_shstrndx, | |
548 | elf_section_data (sec)->rel_hdr.sh_name)); | |
549 | if (name == NULL) | |
550 | return false; | |
551 | ||
552 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 | |
553 | && strcmp (bfd_get_section_name (abfd, sec), | |
554 | name + 5) == 0); | |
555 | ||
556 | sreloc = bfd_get_section_by_name (dynobj, name); | |
557 | if (sreloc == NULL) | |
558 | { | |
559 | flagword flags; | |
560 | ||
561 | sreloc = bfd_make_section (dynobj, name); | |
562 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | |
563 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
564 | if ((sec->flags & SEC_ALLOC) != 0) | |
565 | flags |= SEC_ALLOC | SEC_LOAD; | |
566 | if (sreloc == NULL | |
567 | || ! bfd_set_section_flags (dynobj, sreloc, flags) | |
cc78d0af | 568 | || ! bfd_set_section_alignment (dynobj, sreloc, 3)) |
70256ad8 AJ |
569 | return false; |
570 | } | |
8df9fc9d AJ |
571 | if (sec->flags & SEC_READONLY) |
572 | info->flags |= DF_TEXTREL; | |
70256ad8 AJ |
573 | } |
574 | ||
575 | sreloc->_raw_size += sizeof (Elf64_External_Rela); | |
576 | ||
577 | /* If this is a global symbol, we count the number of PC | |
578 | relative relocations we have entered for this symbol, | |
579 | so that we can discard them later as necessary. Note | |
580 | that this function is only called if we are using an | |
581 | elf64_x86_64 linker hash table, which means that h is | |
582 | really a pointer to an elf64_x86_64_link_hash_entry. */ | |
cc78d0af AJ |
583 | if (h != NULL |
584 | && ((ELF64_R_TYPE (rel->r_info) == R_X86_64_PC8) | |
585 | || (ELF64_R_TYPE (rel->r_info) == R_X86_64_PC16) | |
586 | || (ELF64_R_TYPE (rel->r_info) == R_X86_64_PC32))) | |
70256ad8 AJ |
587 | { |
588 | struct elf64_x86_64_link_hash_entry *eh; | |
589 | struct elf64_x86_64_pcrel_relocs_copied *p; | |
590 | ||
591 | eh = (struct elf64_x86_64_link_hash_entry *) h; | |
592 | ||
593 | for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next) | |
594 | if (p->section == sreloc) | |
595 | break; | |
596 | ||
597 | if (p == NULL) | |
598 | { | |
599 | p = ((struct elf64_x86_64_pcrel_relocs_copied *) | |
dc810e39 | 600 | bfd_alloc (dynobj, (bfd_size_type) sizeof *p)); |
70256ad8 AJ |
601 | if (p == NULL) |
602 | return false; | |
603 | p->next = eh->pcrel_relocs_copied; | |
604 | eh->pcrel_relocs_copied = p; | |
605 | p->section = sreloc; | |
606 | p->count = 0; | |
607 | } | |
608 | ||
609 | ++p->count; | |
610 | } | |
611 | } | |
612 | break; | |
fe4770f4 AJ |
613 | |
614 | /* This relocation describes the C++ object vtable hierarchy. | |
615 | Reconstruct it for later use during GC. */ | |
616 | case R_X86_64_GNU_VTINHERIT: | |
617 | if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
618 | return false; | |
619 | break; | |
620 | ||
621 | /* This relocation describes which C++ vtable entries are actually | |
622 | used. Record for later use during GC. */ | |
623 | case R_X86_64_GNU_VTENTRY: | |
cc78d0af | 624 | if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
fe4770f4 AJ |
625 | return false; |
626 | break; | |
70256ad8 AJ |
627 | } |
628 | } | |
629 | ||
630 | return true; | |
631 | } | |
632 | ||
633 | /* Return the section that should be marked against GC for a given | |
407443a3 | 634 | relocation. */ |
70256ad8 AJ |
635 | |
636 | static asection * | |
637 | elf64_x86_64_gc_mark_hook (abfd, info, rel, h, sym) | |
638 | bfd *abfd; | |
639 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
640 | Elf_Internal_Rela *rel ATTRIBUTE_UNUSED; | |
641 | struct elf_link_hash_entry *h; | |
642 | Elf_Internal_Sym *sym; | |
643 | { | |
644 | if (h != NULL) | |
645 | { | |
fe4770f4 | 646 | switch (ELF64_R_TYPE (rel->r_info)) |
70256ad8 | 647 | { |
fe4770f4 AJ |
648 | case R_X86_64_GNU_VTINHERIT: |
649 | case R_X86_64_GNU_VTENTRY: | |
650 | break; | |
70256ad8 AJ |
651 | |
652 | default: | |
fe4770f4 AJ |
653 | switch (h->root.type) |
654 | { | |
655 | case bfd_link_hash_defined: | |
656 | case bfd_link_hash_defweak: | |
657 | return h->root.u.def.section; | |
658 | ||
659 | case bfd_link_hash_common: | |
660 | return h->root.u.c.p->section; | |
661 | ||
662 | default: | |
663 | break; | |
664 | } | |
70256ad8 AJ |
665 | } |
666 | } | |
667 | else | |
668 | { | |
669 | if (!(elf_bad_symtab (abfd) | |
670 | && ELF_ST_BIND (sym->st_info) != STB_LOCAL) | |
671 | && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) | |
672 | && sym->st_shndx != SHN_COMMON)) | |
673 | { | |
674 | return bfd_section_from_elf_index (abfd, sym->st_shndx); | |
675 | } | |
676 | } | |
677 | ||
678 | return NULL; | |
679 | } | |
680 | ||
407443a3 | 681 | /* Update the got entry reference counts for the section being removed. */ |
70256ad8 AJ |
682 | |
683 | static boolean | |
684 | elf64_x86_64_gc_sweep_hook (abfd, info, sec, relocs) | |
685 | bfd *abfd; | |
686 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
687 | asection *sec; | |
688 | const Elf_Internal_Rela *relocs; | |
689 | { | |
690 | Elf_Internal_Shdr *symtab_hdr; | |
691 | struct elf_link_hash_entry **sym_hashes; | |
692 | bfd_signed_vma *local_got_refcounts; | |
693 | const Elf_Internal_Rela *rel, *relend; | |
694 | unsigned long r_symndx; | |
695 | struct elf_link_hash_entry *h; | |
696 | bfd *dynobj; | |
697 | asection *sgot; | |
698 | asection *srelgot; | |
699 | ||
700 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
701 | sym_hashes = elf_sym_hashes (abfd); | |
702 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
703 | ||
704 | dynobj = elf_hash_table (info)->dynobj; | |
705 | if (dynobj == NULL) | |
706 | return true; | |
707 | ||
708 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
709 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
710 | ||
711 | relend = relocs + sec->reloc_count; | |
712 | for (rel = relocs; rel < relend; rel++) | |
713 | switch (ELF64_R_TYPE (rel->r_info)) | |
714 | { | |
715 | case R_X86_64_GOT32: | |
716 | case R_X86_64_GOTPCREL: | |
717 | r_symndx = ELF64_R_SYM (rel->r_info); | |
718 | if (r_symndx >= symtab_hdr->sh_info) | |
719 | { | |
720 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
721 | if (h->got.refcount > 0) | |
722 | { | |
723 | h->got.refcount -= 1; | |
724 | if (h->got.refcount == 0) | |
725 | { | |
726 | sgot->_raw_size -= GOT_ENTRY_SIZE; | |
727 | srelgot->_raw_size -= sizeof (Elf64_External_Rela); | |
728 | } | |
729 | } | |
730 | } | |
731 | else if (local_got_refcounts != NULL) | |
732 | { | |
733 | if (local_got_refcounts[r_symndx] > 0) | |
734 | { | |
735 | local_got_refcounts[r_symndx] -= 1; | |
736 | if (local_got_refcounts[r_symndx] == 0) | |
737 | { | |
738 | sgot->_raw_size -= GOT_ENTRY_SIZE; | |
739 | if (info->shared) | |
740 | srelgot->_raw_size -= sizeof (Elf64_External_Rela); | |
741 | } | |
742 | } | |
743 | } | |
744 | break; | |
745 | ||
746 | case R_X86_64_PLT32: | |
747 | r_symndx = ELF64_R_SYM (rel->r_info); | |
748 | if (r_symndx >= symtab_hdr->sh_info) | |
749 | { | |
750 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
751 | if (h->plt.refcount > 0) | |
752 | h->plt.refcount -= 1; | |
753 | } | |
754 | break; | |
755 | ||
756 | default: | |
757 | break; | |
758 | } | |
759 | ||
760 | return true; | |
761 | } | |
762 | ||
763 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
764 | regular object. The current definition is in some section of the | |
765 | dynamic object, but we're not including those sections. We have to | |
766 | change the definition to something the rest of the link can | |
407443a3 | 767 | understand. */ |
70256ad8 AJ |
768 | |
769 | static boolean | |
770 | elf64_x86_64_adjust_dynamic_symbol (info, h) | |
771 | struct bfd_link_info *info; | |
772 | struct elf_link_hash_entry *h; | |
773 | { | |
774 | bfd *dynobj; | |
775 | asection *s; | |
776 | unsigned int power_of_two; | |
777 | ||
778 | dynobj = elf_hash_table (info)->dynobj; | |
779 | ||
780 | /* Make sure we know what is going on here. */ | |
781 | BFD_ASSERT (dynobj != NULL | |
782 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) | |
783 | || h->weakdef != NULL | |
784 | || ((h->elf_link_hash_flags | |
785 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
786 | && (h->elf_link_hash_flags | |
787 | & ELF_LINK_HASH_REF_REGULAR) != 0 | |
788 | && (h->elf_link_hash_flags | |
789 | & ELF_LINK_HASH_DEF_REGULAR) == 0))); | |
790 | ||
791 | /* If this is a function, put it in the procedure linkage table. We | |
792 | will fill in the contents of the procedure linkage table later, | |
793 | when we know the address of the .got section. */ | |
794 | if (h->type == STT_FUNC | |
795 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) | |
796 | { | |
407443a3 AJ |
797 | if ((! info->shared |
798 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
799 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0) | |
800 | || (info->shared && h->plt.refcount <= 0)) | |
70256ad8 | 801 | { |
70256ad8 AJ |
802 | /* This case can occur if we saw a PLT32 reloc in an input |
803 | file, but the symbol was never referred to by a dynamic | |
804 | object, or if all references were garbage collected. In | |
805 | such a case, we don't actually need to build a procedure | |
806 | linkage table, and we can just do a PC32 reloc instead. */ | |
70256ad8 AJ |
807 | h->plt.offset = (bfd_vma) -1; |
808 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
809 | return true; | |
810 | } | |
811 | ||
812 | /* Make sure this symbol is output as a dynamic symbol. */ | |
813 | if (h->dynindx == -1) | |
814 | { | |
815 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) | |
816 | return false; | |
817 | } | |
818 | ||
819 | s = bfd_get_section_by_name (dynobj, ".plt"); | |
820 | BFD_ASSERT (s != NULL); | |
821 | ||
822 | /* If this is the first .plt entry, make room for the special | |
823 | first entry. */ | |
824 | if (s->_raw_size == 0) | |
825 | s->_raw_size = PLT_ENTRY_SIZE; | |
826 | ||
827 | /* If this symbol is not defined in a regular file, and we are | |
828 | not generating a shared library, then set the symbol to this | |
407443a3 | 829 | location in the .plt. This is required to make function |
70256ad8 AJ |
830 | pointers compare as equal between the normal executable and |
831 | the shared library. */ | |
832 | if (! info->shared | |
833 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
834 | { | |
835 | h->root.u.def.section = s; | |
836 | h->root.u.def.value = s->_raw_size; | |
837 | } | |
838 | ||
839 | h->plt.offset = s->_raw_size; | |
840 | ||
841 | /* Make room for this entry. */ | |
842 | s->_raw_size += PLT_ENTRY_SIZE; | |
843 | ||
407443a3 AJ |
844 | /* We also need to make an entry in the .got.plt section, which |
845 | will be placed in the .got section by the linker script. */ | |
846 | s = bfd_get_section_by_name (dynobj, ".got.plt"); | |
847 | BFD_ASSERT (s != NULL); | |
848 | s->_raw_size += GOT_ENTRY_SIZE; | |
849 | ||
70256ad8 AJ |
850 | /* We also need to make an entry in the .rela.plt section. */ |
851 | s = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
852 | BFD_ASSERT (s != NULL); | |
853 | s->_raw_size += sizeof (Elf64_External_Rela); | |
854 | ||
855 | return true; | |
856 | } | |
bbd7ec4a AM |
857 | else |
858 | h->plt.offset = (bfd_vma) -1; | |
70256ad8 AJ |
859 | |
860 | /* If this is a weak symbol, and there is a real definition, the | |
861 | processor independent code will have arranged for us to see the | |
407443a3 | 862 | real definition first, and we can just use the same value. */ |
70256ad8 AJ |
863 | if (h->weakdef != NULL) |
864 | { | |
865 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
866 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
867 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
868 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
869 | return true; | |
870 | } | |
871 | ||
872 | /* This is a reference to a symbol defined by a dynamic object which | |
407443a3 | 873 | is not a function. */ |
70256ad8 AJ |
874 | |
875 | /* If we are creating a shared library, we must presume that the | |
876 | only references to the symbol are via the global offset table. | |
877 | For such cases we need not do anything here; the relocations will | |
407443a3 | 878 | be handled correctly by relocate_section. */ |
70256ad8 AJ |
879 | if (info->shared) |
880 | return true; | |
881 | ||
882 | /* If there are no references to this symbol that do not use the | |
883 | GOT, we don't need to generate a copy reloc. */ | |
884 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) | |
885 | return true; | |
886 | ||
887 | /* We must allocate the symbol in our .dynbss section, which will | |
407443a3 | 888 | become part of the .bss section of the executable. There will be |
70256ad8 AJ |
889 | an entry for this symbol in the .dynsym section. The dynamic |
890 | object will contain position independent code, so all references | |
891 | from the dynamic object to this symbol will go through the global | |
892 | offset table. The dynamic linker will use the .dynsym entry to | |
893 | determine the address it must put in the global offset table, so | |
894 | both the dynamic object and the regular object will refer to the | |
895 | same memory location for the variable. */ | |
896 | ||
897 | s = bfd_get_section_by_name (dynobj, ".dynbss"); | |
898 | BFD_ASSERT (s != NULL); | |
899 | ||
900 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker | |
901 | to copy the initial value out of the dynamic object and into the | |
902 | runtime process image. We need to remember the offset into the | |
903 | .rela.bss section we are going to use. */ | |
904 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
905 | { | |
906 | asection *srel; | |
907 | ||
908 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
909 | BFD_ASSERT (srel != NULL); | |
910 | srel->_raw_size += sizeof (Elf64_External_Rela); | |
911 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; | |
912 | } | |
913 | ||
914 | /* We need to figure out the alignment required for this symbol. I | |
407443a3 | 915 | have no idea how ELF linkers handle this. 16-bytes is the size |
70256ad8 AJ |
916 | of the largest type that requires hard alignment -- long double. */ |
917 | /* FIXME: This is VERY ugly. Should be fixed for all architectures using | |
918 | this construct. */ | |
919 | power_of_two = bfd_log2 (h->size); | |
920 | if (power_of_two > 4) | |
921 | power_of_two = 4; | |
922 | ||
923 | /* Apply the required alignment. */ | |
924 | s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two)); | |
925 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) | |
926 | { | |
927 | if (! bfd_set_section_alignment (dynobj, s, power_of_two)) | |
928 | return false; | |
929 | } | |
930 | ||
931 | /* Define the symbol as being at this point in the section. */ | |
932 | h->root.u.def.section = s; | |
933 | h->root.u.def.value = s->_raw_size; | |
934 | ||
935 | /* Increment the section size to make room for the symbol. */ | |
936 | s->_raw_size += h->size; | |
937 | ||
938 | return true; | |
939 | } | |
940 | ||
941 | /* Set the sizes of the dynamic sections. */ | |
942 | ||
943 | static boolean | |
944 | elf64_x86_64_size_dynamic_sections (output_bfd, info) | |
8df9fc9d | 945 | bfd *output_bfd ATTRIBUTE_UNUSED; |
70256ad8 AJ |
946 | struct bfd_link_info *info; |
947 | { | |
948 | bfd *dynobj; | |
949 | asection *s; | |
950 | boolean plt; | |
951 | boolean relocs; | |
70256ad8 AJ |
952 | |
953 | dynobj = elf_hash_table (info)->dynobj; | |
954 | BFD_ASSERT (dynobj != NULL); | |
955 | ||
956 | if (elf_hash_table (info)->dynamic_sections_created) | |
957 | { | |
958 | /* Set the contents of the .interp section to the interpreter. */ | |
959 | if (! info->shared) | |
960 | { | |
961 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
962 | BFD_ASSERT (s != NULL); | |
963 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; | |
964 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
965 | } | |
966 | } | |
967 | else | |
968 | { | |
969 | /* We may have created entries in the .rela.got section. | |
407443a3 AJ |
970 | However, if we are not creating the dynamic sections, we will |
971 | not actually use these entries. Reset the size of .rela.got, | |
972 | which will cause it to get stripped from the output file | |
973 | below. */ | |
70256ad8 AJ |
974 | s = bfd_get_section_by_name (dynobj, ".rela.got"); |
975 | if (s != NULL) | |
976 | s->_raw_size = 0; | |
977 | } | |
978 | ||
979 | /* If this is a -Bsymbolic shared link, then we need to discard all | |
980 | PC relative relocs against symbols defined in a regular object. | |
981 | We allocated space for them in the check_relocs routine, but we | |
982 | will not fill them in in the relocate_section routine. */ | |
983 | if (info->shared) | |
984 | elf64_x86_64_link_hash_traverse (elf64_x86_64_hash_table (info), | |
985 | elf64_x86_64_discard_copies, | |
986 | (PTR) info); | |
987 | ||
988 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
989 | determined the sizes of the various dynamic sections. Allocate | |
990 | memory for them. */ | |
8df9fc9d | 991 | plt = relocs = false; |
70256ad8 AJ |
992 | for (s = dynobj->sections; s != NULL; s = s->next) |
993 | { | |
994 | const char *name; | |
995 | boolean strip; | |
996 | ||
997 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
998 | continue; | |
999 | ||
1000 | /* It's OK to base decisions on the section name, because none | |
1001 | of the dynobj section names depend upon the input files. */ | |
1002 | name = bfd_get_section_name (dynobj, s); | |
1003 | ||
1004 | strip = false; | |
1005 | if (strcmp (name, ".plt") == 0) | |
1006 | { | |
1007 | if (s->_raw_size == 0) | |
1008 | { | |
1009 | /* Strip this section if we don't need it; see the | |
407443a3 | 1010 | comment below. */ |
70256ad8 AJ |
1011 | strip = true; |
1012 | } | |
1013 | else | |
1014 | { | |
1015 | /* Remember whether there is a PLT. */ | |
1016 | plt = true; | |
1017 | } | |
1018 | } | |
1019 | else if (strncmp (name, ".rela", 5) == 0) | |
1020 | { | |
1021 | if (s->_raw_size == 0) | |
1022 | { | |
1023 | /* If we don't need this section, strip it from the | |
1024 | output file. This is mostly to handle .rela.bss and | |
1025 | .rela.plt. We must create both sections in | |
1026 | create_dynamic_sections, because they must be created | |
1027 | before the linker maps input sections to output | |
1028 | sections. The linker does that before | |
1029 | adjust_dynamic_symbol is called, and it is that | |
1030 | function which decides whether anything needs to go | |
1031 | into these sections. */ | |
1032 | strip = true; | |
1033 | } | |
1034 | else | |
1035 | { | |
70256ad8 | 1036 | if (strcmp (name, ".rela.plt") != 0) |
8df9fc9d | 1037 | relocs = true; |
70256ad8 AJ |
1038 | |
1039 | /* We use the reloc_count field as a counter if we need | |
1040 | to copy relocs into the output file. */ | |
1041 | s->reloc_count = 0; | |
1042 | } | |
1043 | } | |
1044 | else if (strncmp (name, ".got", 4) != 0) | |
1045 | { | |
1046 | /* It's not one of our sections, so don't allocate space. */ | |
1047 | continue; | |
1048 | } | |
1049 | ||
1050 | if (strip) | |
1051 | { | |
1052 | _bfd_strip_section_from_output (info, s); | |
1053 | continue; | |
1054 | } | |
1055 | ||
1056 | /* Allocate memory for the section contents. We use bfd_zalloc | |
1057 | here in case unused entries are not reclaimed before the | |
1058 | section's contents are written out. This should not happen, | |
1059 | but this way if it does, we get a R_X86_64_NONE reloc instead | |
1060 | of garbage. */ | |
1061 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); | |
1062 | if (s->contents == NULL && s->_raw_size != 0) | |
1063 | return false; | |
1064 | } | |
1065 | ||
1066 | if (elf_hash_table (info)->dynamic_sections_created) | |
1067 | { | |
1068 | /* Add some entries to the .dynamic section. We fill in the | |
1069 | values later, in elf64_x86_64_finish_dynamic_sections, but we | |
1070 | must add the entries now so that we get the correct size for | |
407443a3 | 1071 | the .dynamic section. The DT_DEBUG entry is filled in by the |
70256ad8 | 1072 | dynamic linker and used by the debugger. */ |
dc810e39 AM |
1073 | #define add_dynamic_entry(TAG, VAL) \ |
1074 | bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) | |
1075 | ||
70256ad8 AJ |
1076 | if (! info->shared) |
1077 | { | |
dc810e39 | 1078 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
70256ad8 AJ |
1079 | return false; |
1080 | } | |
1081 | ||
1082 | if (plt) | |
1083 | { | |
dc810e39 AM |
1084 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
1085 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
1086 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
1087 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
70256ad8 AJ |
1088 | return false; |
1089 | } | |
1090 | ||
1091 | if (relocs) | |
1092 | { | |
dc810e39 AM |
1093 | if (!add_dynamic_entry (DT_RELA, 0) |
1094 | || !add_dynamic_entry (DT_RELASZ, 0) | |
1095 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) | |
70256ad8 AJ |
1096 | return false; |
1097 | } | |
1098 | ||
8df9fc9d | 1099 | if ((info->flags & DF_TEXTREL) != 0) |
70256ad8 | 1100 | { |
dc810e39 | 1101 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
70256ad8 | 1102 | return false; |
70256ad8 AJ |
1103 | } |
1104 | } | |
dc810e39 | 1105 | #undef add_dynamic_entry |
70256ad8 AJ |
1106 | |
1107 | return true; | |
1108 | } | |
1109 | ||
1110 | /* This function is called via elf64_x86_64_link_hash_traverse if we are | |
1111 | creating a shared object. In the -Bsymbolic case, it discards the | |
1112 | space allocated to copy PC relative relocs against symbols which | |
1113 | are defined in regular objects. For the normal non-symbolic case, | |
1114 | we also discard space for relocs that have become local due to | |
1115 | symbol visibility changes. We allocated space for them in the | |
1116 | check_relocs routine, but we won't fill them in in the | |
1117 | relocate_section routine. */ | |
1118 | ||
1119 | static boolean | |
1120 | elf64_x86_64_discard_copies (h, inf) | |
1121 | struct elf64_x86_64_link_hash_entry *h; | |
1122 | PTR inf; | |
1123 | { | |
1124 | struct elf64_x86_64_pcrel_relocs_copied *s; | |
1125 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
1126 | ||
1127 | /* If a symbol has been forced local or we have found a regular | |
1128 | definition for the symbolic link case, then we won't be needing | |
1129 | any relocs. */ | |
1130 | if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
1131 | && ((h->root.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 | |
1132 | || info->symbolic)) | |
1133 | { | |
1134 | for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) | |
1135 | s->section->_raw_size -= s->count * sizeof (Elf64_External_Rela); | |
1136 | } | |
1137 | ||
1138 | return true; | |
1139 | } | |
1140 | ||
8d88c4ca NC |
1141 | /* Relocate an x86_64 ELF section. */ |
1142 | ||
1143 | static boolean | |
1144 | elf64_x86_64_relocate_section (output_bfd, info, input_bfd, input_section, | |
fe4770f4 | 1145 | contents, relocs, local_syms, local_sections) |
8d88c4ca NC |
1146 | bfd *output_bfd; |
1147 | struct bfd_link_info *info; | |
1148 | bfd *input_bfd; | |
1149 | asection *input_section; | |
1150 | bfd_byte *contents; | |
1151 | Elf_Internal_Rela *relocs; | |
1152 | Elf_Internal_Sym *local_syms; | |
1153 | asection **local_sections; | |
1154 | { | |
1155 | bfd *dynobj; | |
1156 | Elf_Internal_Shdr *symtab_hdr; | |
1157 | struct elf_link_hash_entry **sym_hashes; | |
1158 | bfd_vma *local_got_offsets; | |
70256ad8 AJ |
1159 | asection *sgot; |
1160 | asection *splt; | |
8d88c4ca | 1161 | asection *sreloc; |
70256ad8 | 1162 | Elf_Internal_Rela *rela; |
8d88c4ca NC |
1163 | Elf_Internal_Rela *relend; |
1164 | ||
1165 | dynobj = elf_hash_table (info)->dynobj; | |
1166 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
1167 | sym_hashes = elf_sym_hashes (input_bfd); | |
1168 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
1169 | ||
70256ad8 | 1170 | sreloc = splt = sgot = NULL; |
8d88c4ca | 1171 | if (dynobj != NULL) |
70256ad8 AJ |
1172 | { |
1173 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1174 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1175 | } | |
8d88c4ca | 1176 | |
70256ad8 | 1177 | rela = relocs; |
8d88c4ca | 1178 | relend = relocs + input_section->reloc_count; |
70256ad8 | 1179 | for (; rela < relend; rela++) |
8d88c4ca NC |
1180 | { |
1181 | int r_type; | |
1182 | reloc_howto_type *howto; | |
1183 | unsigned long r_symndx; | |
1184 | struct elf_link_hash_entry *h; | |
1185 | Elf_Internal_Sym *sym; | |
1186 | asection *sec; | |
1187 | bfd_vma relocation; | |
1188 | bfd_reloc_status_type r; | |
1189 | unsigned int indx; | |
1190 | ||
70256ad8 | 1191 | r_type = ELF64_R_TYPE (rela->r_info); |
fe4770f4 AJ |
1192 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
1193 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
1194 | continue; | |
8d88c4ca NC |
1195 | |
1196 | if ((indx = (unsigned) r_type) >= R_X86_64_max) | |
8da6118f KH |
1197 | { |
1198 | bfd_set_error (bfd_error_bad_value); | |
1199 | return false; | |
1200 | } | |
8d88c4ca NC |
1201 | howto = x86_64_elf_howto_table + indx; |
1202 | ||
70256ad8 | 1203 | r_symndx = ELF64_R_SYM (rela->r_info); |
8d88c4ca NC |
1204 | |
1205 | if (info->relocateable) | |
8da6118f KH |
1206 | { |
1207 | /* This is a relocateable link. We don't have to change | |
1208 | anything, unless the reloc is against a section symbol, | |
1209 | in which case we have to adjust according to where the | |
1210 | section symbol winds up in the output section. */ | |
1211 | if (r_symndx < symtab_hdr->sh_info) | |
1212 | { | |
1213 | sym = local_syms + r_symndx; | |
1214 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1215 | { | |
1216 | sec = local_sections[r_symndx]; | |
70256ad8 | 1217 | rela->r_addend += sec->output_offset + sym->st_value; |
8da6118f KH |
1218 | } |
1219 | } | |
1220 | ||
1221 | continue; | |
1222 | } | |
8d88c4ca | 1223 | |
407443a3 | 1224 | /* This is a final link. */ |
8d88c4ca NC |
1225 | h = NULL; |
1226 | sym = NULL; | |
1227 | sec = NULL; | |
1228 | if (r_symndx < symtab_hdr->sh_info) | |
8da6118f KH |
1229 | { |
1230 | sym = local_syms + r_symndx; | |
1231 | sec = local_sections[r_symndx]; | |
1232 | relocation = (sec->output_section->vma | |
1233 | + sec->output_offset | |
1234 | + sym->st_value); | |
1235 | } | |
8d88c4ca | 1236 | else |
8da6118f KH |
1237 | { |
1238 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1239 | while (h->root.type == bfd_link_hash_indirect | |
1240 | || h->root.type == bfd_link_hash_warning) | |
1241 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1242 | if (h->root.type == bfd_link_hash_defined | |
1243 | || h->root.type == bfd_link_hash_defweak) | |
1244 | { | |
1245 | sec = h->root.u.def.section; | |
6a2bda3f AJ |
1246 | if ((r_type == R_X86_64_PLT32 |
1247 | && splt != NULL | |
1248 | && h->plt.offset != (bfd_vma) -1) | |
1249 | || ((r_type == R_X86_64_GOT32 || r_type == R_X86_64_GOTPCREL) | |
bcdd92f3 AJ |
1250 | && elf_hash_table (info)->dynamic_sections_created |
1251 | && (!info->shared | |
1252 | || (! info->symbolic && h->dynindx != -1) | |
1253 | || (h->elf_link_hash_flags | |
1254 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
1255 | || (info->shared | |
1256 | && ((! info->symbolic && h->dynindx != -1) | |
1257 | || (h->elf_link_hash_flags | |
1258 | & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
80643fbc AJ |
1259 | && (r_type == R_X86_64_8 |
1260 | || r_type == R_X86_64_16 | |
1261 | || r_type == R_X86_64_32 | |
1262 | || r_type == R_X86_64_64 | |
1263 | || r_type == R_X86_64_PC8 | |
1264 | || r_type == R_X86_64_PC16 | |
1265 | || r_type == R_X86_64_PC32) | |
bcdd92f3 AJ |
1266 | && ((input_section->flags & SEC_ALLOC) != 0 |
1267 | /* DWARF will emit R_X86_64_32 relocations in its | |
1268 | sections against symbols defined externally | |
1269 | in shared libraries. We can't do anything | |
1270 | with them here. */ | |
1271 | || ((input_section->flags & SEC_DEBUGGING) != 0 | |
1272 | && (h->elf_link_hash_flags | |
1273 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0)))) | |
1274 | { | |
1275 | /* In these cases, we don't need the relocation | |
1276 | value. We check specially because in some | |
1277 | obscure cases sec->output_section will be NULL. */ | |
1278 | relocation = 0; | |
1279 | } | |
1280 | else if (sec->output_section == NULL) | |
8da6118f KH |
1281 | { |
1282 | (*_bfd_error_handler) | |
1283 | (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"), | |
8f615d07 | 1284 | bfd_archive_filename (input_bfd), h->root.root.string, |
8da6118f KH |
1285 | bfd_get_section_name (input_bfd, input_section)); |
1286 | relocation = 0; | |
1287 | } | |
1288 | else | |
1289 | relocation = (h->root.u.def.value | |
1290 | + sec->output_section->vma | |
1291 | + sec->output_offset); | |
1292 | } | |
1293 | else if (h->root.type == bfd_link_hash_undefweak) | |
1294 | relocation = 0; | |
671bae9c NC |
1295 | else if (info->shared |
1296 | && (!info->symbolic || info->allow_shlib_undefined) | |
1297 | && !info->no_undefined | |
70256ad8 AJ |
1298 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) |
1299 | relocation = 0; | |
8da6118f KH |
1300 | else |
1301 | { | |
1302 | if (! ((*info->callbacks->undefined_symbol) | |
1303 | (info, h->root.root.string, input_bfd, | |
70256ad8 | 1304 | input_section, rela->r_offset, |
8da6118f KH |
1305 | (!info->shared || info->no_undefined |
1306 | || ELF_ST_VISIBILITY (h->other))))) | |
1307 | return false; | |
1308 | relocation = 0; | |
1309 | } | |
1310 | } | |
70256ad8 AJ |
1311 | |
1312 | /* When generating a shared object, the relocations handled here are | |
1313 | copied into the output file to be resolved at run time. */ | |
1314 | switch (r_type) | |
1315 | { | |
1316 | case R_X86_64_GOT32: | |
1317 | /* Relocation is to the entry for this symbol in the global | |
1318 | offset table. */ | |
70256ad8 AJ |
1319 | case R_X86_64_GOTPCREL: |
1320 | /* Use global offset table as symbol value. */ | |
51e0a107 | 1321 | BFD_ASSERT (sgot != NULL); |
053579d7 | 1322 | |
51e0a107 | 1323 | if (h != NULL) |
70256ad8 | 1324 | { |
51e0a107 JH |
1325 | bfd_vma off = h->got.offset; |
1326 | BFD_ASSERT (off != (bfd_vma) -1); | |
1327 | ||
1328 | if (! elf_hash_table (info)->dynamic_sections_created | |
1329 | || (info->shared | |
1330 | && (info->symbolic || h->dynindx == -1) | |
1331 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) | |
1332 | { | |
1333 | /* This is actually a static link, or it is a -Bsymbolic | |
1334 | link and the symbol is defined locally, or the symbol | |
407443a3 | 1335 | was forced to be local because of a version file. We |
51e0a107 JH |
1336 | must initialize this entry in the global offset table. |
1337 | Since the offset must always be a multiple of 8, we | |
1338 | use the least significant bit to record whether we | |
1339 | have initialized it already. | |
1340 | ||
1341 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
1342 | relocation entry to initialize the value. This is |
1343 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
1344 | if ((off & 1) != 0) |
1345 | off &= ~1; | |
1346 | else | |
1347 | { | |
1348 | bfd_put_64 (output_bfd, relocation, | |
1349 | sgot->contents + off); | |
1350 | h->got.offset |= 1; | |
1351 | } | |
1352 | } | |
053579d7 AJ |
1353 | if (r_type == R_X86_64_GOTPCREL) |
1354 | relocation = sgot->output_section->vma + sgot->output_offset + off; | |
1355 | else | |
1356 | relocation = sgot->output_offset + off; | |
70256ad8 | 1357 | } |
51e0a107 JH |
1358 | else |
1359 | { | |
1360 | bfd_vma off; | |
70256ad8 | 1361 | |
51e0a107 JH |
1362 | BFD_ASSERT (local_got_offsets != NULL |
1363 | && local_got_offsets[r_symndx] != (bfd_vma) -1); | |
1364 | ||
1365 | off = local_got_offsets[r_symndx]; | |
1366 | ||
1367 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
1368 | the least significant bit to record whether we have |
1369 | already generated the necessary reloc. */ | |
51e0a107 JH |
1370 | if ((off & 1) != 0) |
1371 | off &= ~1; | |
1372 | else | |
1373 | { | |
1374 | bfd_put_64 (output_bfd, relocation, sgot->contents + off); | |
1375 | ||
1376 | if (info->shared) | |
1377 | { | |
1378 | asection *srelgot; | |
1379 | Elf_Internal_Rela outrel; | |
70256ad8 | 1380 | |
51e0a107 JH |
1381 | /* We need to generate a R_X86_64_RELATIVE reloc |
1382 | for the dynamic linker. */ | |
1383 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1384 | BFD_ASSERT (srelgot != NULL); | |
1385 | ||
1386 | outrel.r_offset = (sgot->output_section->vma | |
1387 | + sgot->output_offset | |
1388 | + off); | |
1389 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); | |
1390 | outrel.r_addend = relocation; | |
1391 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, | |
1392 | (((Elf64_External_Rela *) | |
1393 | srelgot->contents) | |
1394 | + srelgot->reloc_count)); | |
1395 | ++srelgot->reloc_count; | |
1396 | } | |
1397 | ||
1398 | local_got_offsets[r_symndx] |= 1; | |
1399 | } | |
1400 | ||
053579d7 AJ |
1401 | if (r_type == R_X86_64_GOTPCREL) |
1402 | relocation = sgot->output_section->vma + sgot->output_offset + off; | |
1403 | else | |
1404 | relocation = sgot->output_offset + off; | |
51e0a107 | 1405 | } |
6a2bda3f | 1406 | |
70256ad8 AJ |
1407 | break; |
1408 | ||
1409 | case R_X86_64_PLT32: | |
1410 | /* Relocation is to the entry for this symbol in the | |
1411 | procedure linkage table. */ | |
1412 | ||
1413 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 1414 | without using the procedure linkage table. */ |
70256ad8 AJ |
1415 | if (h == NULL) |
1416 | break; | |
1417 | ||
1418 | if (h->plt.offset == (bfd_vma) -1 || splt == NULL) | |
1419 | { | |
1420 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
1421 | happens when statically linking PIC code, or when |
1422 | using -Bsymbolic. */ | |
70256ad8 AJ |
1423 | break; |
1424 | } | |
1425 | ||
1426 | relocation = (splt->output_section->vma | |
1427 | + splt->output_offset | |
1428 | + h->plt.offset); | |
1429 | break; | |
1430 | ||
fd8ab9e5 AJ |
1431 | case R_X86_64_PC8: |
1432 | case R_X86_64_PC16: | |
1433 | case R_X86_64_PC32: | |
f631948d AJ |
1434 | if (h == NULL || h->dynindx == -1 |
1435 | || (info->symbolic | |
1436 | && h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) | |
fd8ab9e5 AJ |
1437 | break; |
1438 | /* Fall through. */ | |
70256ad8 AJ |
1439 | case R_X86_64_8: |
1440 | case R_X86_64_16: | |
1441 | case R_X86_64_32: | |
6b3db546 | 1442 | case R_X86_64_64: |
80643fbc | 1443 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 1444 | the same when it's zeroextended to 64 bit. */ |
ec338859 AM |
1445 | if (info->shared |
1446 | && r_symndx != 0 | |
1447 | && (input_section->flags & SEC_ALLOC) != 0) | |
70256ad8 AJ |
1448 | { |
1449 | Elf_Internal_Rela outrel; | |
1450 | boolean skip, relocate; | |
1451 | ||
1452 | /* When generating a shared object, these relocations | |
1453 | are copied into the output file to be resolved at run | |
407443a3 | 1454 | time. */ |
70256ad8 AJ |
1455 | |
1456 | if (sreloc == NULL) | |
1457 | { | |
1458 | const char *name; | |
1459 | ||
1460 | name = (bfd_elf_string_from_elf_section | |
1461 | (input_bfd, | |
1462 | elf_elfheader (input_bfd)->e_shstrndx, | |
1463 | elf_section_data (input_section)->rel_hdr.sh_name)); | |
1464 | if (name == NULL) | |
1465 | return false; | |
1466 | ||
1467 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 | |
1468 | && strcmp (bfd_get_section_name (input_bfd, | |
1469 | input_section), | |
1470 | name + 5) == 0); | |
1471 | ||
1472 | sreloc = bfd_get_section_by_name (dynobj, name); | |
1473 | BFD_ASSERT (sreloc != NULL); | |
1474 | } | |
1475 | ||
1476 | skip = false; | |
1477 | ||
1478 | if (elf_section_data (input_section)->stab_info == NULL) | |
1479 | outrel.r_offset = rela->r_offset; | |
1480 | else | |
1481 | { | |
1482 | bfd_vma off; | |
1483 | ||
1484 | off = (_bfd_stab_section_offset | |
1485 | (output_bfd, &elf_hash_table (info)->stab_info, | |
1486 | input_section, | |
1487 | &elf_section_data (input_section)->stab_info, | |
1488 | rela->r_offset)); | |
1489 | if (off == (bfd_vma) -1) | |
1490 | skip = true; | |
1491 | outrel.r_offset = off; | |
1492 | } | |
1493 | ||
1494 | outrel.r_offset += (input_section->output_section->vma | |
1495 | + input_section->output_offset); | |
1496 | ||
1497 | if (skip) | |
1498 | { | |
1499 | memset (&outrel, 0, sizeof outrel); | |
1500 | relocate = false; | |
1501 | } | |
fd8ab9e5 AJ |
1502 | /* h->dynindx may be -1 if this symbol was marked to |
1503 | become local. */ | |
1504 | else if (h != NULL | |
1505 | && ((! info->symbolic && h->dynindx != -1) | |
1506 | || (h->elf_link_hash_flags | |
1507 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
70256ad8 | 1508 | { |
fd8ab9e5 | 1509 | BFD_ASSERT (h->dynindx != -1); |
70256ad8 AJ |
1510 | relocate = false; |
1511 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); | |
5608e05b | 1512 | outrel.r_addend = relocation + rela->r_addend; |
70256ad8 AJ |
1513 | } |
1514 | else | |
1515 | { | |
fd8ab9e5 | 1516 | if (r_type == R_X86_64_64) |
70256ad8 AJ |
1517 | { |
1518 | relocate = true; | |
1519 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); | |
5608e05b | 1520 | outrel.r_addend = relocation + rela->r_addend; |
70256ad8 AJ |
1521 | } |
1522 | else | |
1523 | { | |
dc810e39 | 1524 | long sindx; |
fd8ab9e5 AJ |
1525 | |
1526 | if (h == NULL) | |
1527 | sec = local_sections[r_symndx]; | |
1528 | else | |
1529 | { | |
1530 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
1531 | || (h->root.type | |
1532 | == bfd_link_hash_defweak)); | |
1533 | sec = h->root.u.def.section; | |
1534 | } | |
1535 | if (sec != NULL && bfd_is_abs_section (sec)) | |
dc810e39 | 1536 | sindx = 0; |
fd8ab9e5 AJ |
1537 | else if (sec == NULL || sec->owner == NULL) |
1538 | { | |
1539 | bfd_set_error (bfd_error_bad_value); | |
1540 | return false; | |
1541 | } | |
1542 | else | |
1543 | { | |
1544 | asection *osec; | |
1545 | ||
1546 | osec = sec->output_section; | |
dc810e39 AM |
1547 | sindx = elf_section_data (osec)->dynindx; |
1548 | BFD_ASSERT (sindx > 0); | |
fd8ab9e5 AJ |
1549 | } |
1550 | ||
f631948d | 1551 | relocate = false; |
dc810e39 | 1552 | outrel.r_info = ELF64_R_INFO (sindx, r_type); |
f631948d AJ |
1553 | outrel.r_addend = relocation + rela->r_addend; |
1554 | } | |
fd8ab9e5 | 1555 | |
70256ad8 AJ |
1556 | } |
1557 | ||
1558 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, | |
1559 | (((Elf64_External_Rela *) | |
1560 | sreloc->contents) | |
1561 | + sreloc->reloc_count)); | |
1562 | ++sreloc->reloc_count; | |
1563 | ||
1564 | /* If this reloc is against an external symbol, we do | |
1565 | not want to fiddle with the addend. Otherwise, we | |
1566 | need to include the symbol value so that it becomes | |
1567 | an addend for the dynamic reloc. */ | |
1568 | if (! relocate) | |
1569 | continue; | |
1570 | } | |
1571 | ||
1572 | break; | |
1573 | ||
1574 | default: | |
1575 | break; | |
1576 | } | |
8d88c4ca NC |
1577 | |
1578 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
70256ad8 AJ |
1579 | contents, rela->r_offset, |
1580 | relocation, rela->r_addend); | |
8d88c4ca NC |
1581 | |
1582 | if (r != bfd_reloc_ok) | |
8da6118f KH |
1583 | { |
1584 | switch (r) | |
1585 | { | |
1586 | default: | |
1587 | case bfd_reloc_outofrange: | |
1588 | abort (); | |
1589 | case bfd_reloc_overflow: | |
1590 | { | |
1591 | const char *name; | |
1592 | ||
1593 | if (h != NULL) | |
1594 | name = h->root.root.string; | |
1595 | else | |
1596 | { | |
1597 | name = bfd_elf_string_from_elf_section (input_bfd, | |
1598 | symtab_hdr->sh_link, | |
1599 | sym->st_name); | |
1600 | if (name == NULL) | |
1601 | return false; | |
1602 | if (*name == '\0') | |
1603 | name = bfd_section_name (input_bfd, sec); | |
1604 | } | |
1605 | if (! ((*info->callbacks->reloc_overflow) | |
1606 | (info, name, howto->name, (bfd_vma) 0, | |
70256ad8 | 1607 | input_bfd, input_section, rela->r_offset))) |
8da6118f KH |
1608 | return false; |
1609 | } | |
1610 | break; | |
1611 | } | |
1612 | } | |
8d88c4ca | 1613 | } |
70256ad8 AJ |
1614 | |
1615 | return true; | |
1616 | } | |
1617 | ||
1618 | /* Finish up dynamic symbol handling. We set the contents of various | |
1619 | dynamic sections here. */ | |
1620 | ||
1621 | static boolean | |
1622 | elf64_x86_64_finish_dynamic_symbol (output_bfd, info, h, sym) | |
1623 | bfd *output_bfd; | |
1624 | struct bfd_link_info *info; | |
1625 | struct elf_link_hash_entry *h; | |
1626 | Elf_Internal_Sym *sym; | |
1627 | { | |
1628 | bfd *dynobj; | |
1629 | ||
1630 | dynobj = elf_hash_table (info)->dynobj; | |
1631 | ||
1632 | if (h->plt.offset != (bfd_vma) -1) | |
1633 | { | |
1634 | asection *splt; | |
1635 | asection *sgot; | |
1636 | asection *srela; | |
1637 | bfd_vma plt_index; | |
1638 | bfd_vma got_offset; | |
1639 | Elf_Internal_Rela rela; | |
1640 | ||
1641 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 1642 | it up. */ |
70256ad8 AJ |
1643 | |
1644 | BFD_ASSERT (h->dynindx != -1); | |
1645 | ||
1646 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1647 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
1648 | srela = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
1649 | BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); | |
1650 | ||
1651 | /* Get the index in the procedure linkage table which | |
1652 | corresponds to this symbol. This is the index of this symbol | |
1653 | in all the symbols for which we are making plt entries. The | |
1654 | first entry in the procedure linkage table is reserved. */ | |
1655 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
1656 | ||
1657 | /* Get the offset into the .got table of the entry that | |
407443a3 | 1658 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
fe4770f4 | 1659 | bytes. The first three are reserved for the dynamic linker. */ |
70256ad8 AJ |
1660 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; |
1661 | ||
1662 | /* Fill in the entry in the procedure linkage table. */ | |
1663 | memcpy (splt->contents + h->plt.offset, elf64_x86_64_plt_entry, | |
1664 | PLT_ENTRY_SIZE); | |
1665 | ||
1666 | /* Insert the relocation positions of the plt section. The magic | |
1667 | numbers at the end of the statements are the positions of the | |
1668 | relocations in the plt section. */ | |
653165cc AJ |
1669 | /* Put offset for jmp *name@GOTPCREL(%rip), since the |
1670 | instruction uses 6 bytes, subtract this value. */ | |
1671 | bfd_put_32 (output_bfd, | |
1672 | (sgot->output_section->vma | |
1673 | + sgot->output_offset | |
1674 | + got_offset | |
1675 | - splt->output_section->vma | |
1676 | - splt->output_offset | |
1677 | - h->plt.offset | |
1678 | - 6), | |
1679 | splt->contents + h->plt.offset + 2); | |
1680 | /* Put relocation index. */ | |
1681 | bfd_put_32 (output_bfd, plt_index, | |
70256ad8 | 1682 | splt->contents + h->plt.offset + 7); |
653165cc AJ |
1683 | /* Put offset for jmp .PLT0. */ |
1684 | bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE), | |
70256ad8 AJ |
1685 | splt->contents + h->plt.offset + 12); |
1686 | ||
653165cc AJ |
1687 | /* Fill in the entry in the global offset table, initially this |
1688 | points to the pushq instruction in the PLT which is at offset 6. */ | |
70256ad8 AJ |
1689 | bfd_put_64 (output_bfd, (splt->output_section->vma + splt->output_offset |
1690 | + h->plt.offset + 6), | |
1691 | sgot->contents + got_offset); | |
1692 | ||
1693 | /* Fill in the entry in the .rela.plt section. */ | |
1694 | rela.r_offset = (sgot->output_section->vma | |
1695 | + sgot->output_offset | |
1696 | + got_offset); | |
1697 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_JUMP_SLOT); | |
1698 | rela.r_addend = 0; | |
1699 | bfd_elf64_swap_reloca_out (output_bfd, &rela, | |
1700 | ((Elf64_External_Rela *) srela->contents | |
1701 | + plt_index)); | |
1702 | ||
1703 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1704 | { | |
1705 | /* Mark the symbol as undefined, rather than as defined in | |
407443a3 | 1706 | the .plt section. Leave the value alone. */ |
70256ad8 | 1707 | sym->st_shndx = SHN_UNDEF; |
05aa1441 AJ |
1708 | /* If the symbol is weak, we do need to clear the value. |
1709 | Otherwise, the PLT entry would provide a definition for | |
1710 | the symbol even if the symbol wasn't defined anywhere, | |
1711 | and so the symbol would never be NULL. */ | |
1712 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK) | |
1713 | == 0) | |
1714 | sym->st_value = 0; | |
70256ad8 AJ |
1715 | } |
1716 | } | |
1717 | ||
053579d7 AJ |
1718 | if (h->got.offset != (bfd_vma) -1) |
1719 | { | |
1720 | asection *sgot; | |
1721 | asection *srela; | |
1722 | Elf_Internal_Rela rela; | |
1723 | ||
1724 | /* This symbol has an entry in the global offset table. Set it | |
1725 | up. */ | |
1726 | ||
1727 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1728 | srela = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1729 | BFD_ASSERT (sgot != NULL && srela != NULL); | |
1730 | ||
1731 | rela.r_offset = (sgot->output_section->vma | |
1732 | + sgot->output_offset | |
dc810e39 | 1733 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
1734 | |
1735 | /* If this is a static link, or it is a -Bsymbolic link and the | |
1736 | symbol is defined locally or was forced to be local because | |
1737 | of a version file, we just want to emit a RELATIVE reloc. | |
1738 | The entry in the global offset table will already have been | |
1739 | initialized in the relocate_section function. */ | |
1740 | if (! elf_hash_table (info)->dynamic_sections_created | |
1741 | || (info->shared | |
1742 | && (info->symbolic || h->dynindx == -1) | |
1743 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) | |
1744 | { | |
cc78d0af | 1745 | BFD_ASSERT((h->got.offset & 1) != 0); |
053579d7 AJ |
1746 | rela.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); |
1747 | rela.r_addend = (h->root.u.def.value | |
1748 | + h->root.u.def.section->output_section->vma | |
1749 | + h->root.u.def.section->output_offset); | |
1750 | } | |
1751 | else | |
1752 | { | |
1753 | BFD_ASSERT((h->got.offset & 1) == 0); | |
1754 | bfd_put_64 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); | |
1755 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_GLOB_DAT); | |
1756 | rela.r_addend = 0; | |
1757 | } | |
1758 | ||
1759 | bfd_elf64_swap_reloca_out (output_bfd, &rela, | |
1760 | ((Elf64_External_Rela *) srela->contents | |
1761 | + srela->reloc_count)); | |
1762 | ++srela->reloc_count; | |
1763 | } | |
1764 | ||
70256ad8 AJ |
1765 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) |
1766 | { | |
1767 | asection *s; | |
1768 | Elf_Internal_Rela rela; | |
1769 | ||
1770 | /* This symbol needs a copy reloc. Set it up. */ | |
1771 | ||
1772 | BFD_ASSERT (h->dynindx != -1 | |
1773 | && (h->root.type == bfd_link_hash_defined | |
1774 | || h->root.type == bfd_link_hash_defweak)); | |
1775 | ||
1776 | s = bfd_get_section_by_name (h->root.u.def.section->owner, | |
1777 | ".rela.bss"); | |
1778 | BFD_ASSERT (s != NULL); | |
1779 | ||
1780 | rela.r_offset = (h->root.u.def.value | |
1781 | + h->root.u.def.section->output_section->vma | |
1782 | + h->root.u.def.section->output_offset); | |
1783 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_COPY); | |
1784 | rela.r_addend = 0; | |
1785 | bfd_elf64_swap_reloca_out (output_bfd, &rela, | |
1786 | ((Elf64_External_Rela *) s->contents | |
1787 | + s->reloc_count)); | |
1788 | ++s->reloc_count; | |
1789 | } | |
1790 | ||
1791 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
1792 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
1793 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
1794 | sym->st_shndx = SHN_ABS; | |
1795 | ||
1796 | return true; | |
1797 | } | |
1798 | ||
1799 | /* Finish up the dynamic sections. */ | |
1800 | ||
1801 | static boolean | |
1802 | elf64_x86_64_finish_dynamic_sections (output_bfd, info) | |
1803 | bfd *output_bfd; | |
1804 | struct bfd_link_info *info; | |
1805 | { | |
1806 | bfd *dynobj; | |
1807 | asection *sdyn; | |
1808 | asection *sgot; | |
1809 | ||
1810 | dynobj = elf_hash_table (info)->dynobj; | |
1811 | ||
653165cc AJ |
1812 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); |
1813 | BFD_ASSERT (sgot != NULL); | |
70256ad8 AJ |
1814 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
1815 | ||
1816 | if (elf_hash_table (info)->dynamic_sections_created) | |
1817 | { | |
1818 | asection *splt; | |
1819 | Elf64_External_Dyn *dyncon, *dynconend; | |
1820 | ||
407443a3 | 1821 | BFD_ASSERT (sdyn != NULL); |
70256ad8 AJ |
1822 | |
1823 | dyncon = (Elf64_External_Dyn *) sdyn->contents; | |
1824 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
1825 | for (; dyncon < dynconend; dyncon++) | |
1826 | { | |
1827 | Elf_Internal_Dyn dyn; | |
1828 | const char *name; | |
1829 | asection *s; | |
1830 | ||
1831 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); | |
1832 | ||
1833 | switch (dyn.d_tag) | |
1834 | { | |
1835 | default: | |
053579d7 | 1836 | continue; |
70256ad8 AJ |
1837 | |
1838 | case DT_PLTGOT: | |
1839 | name = ".got"; | |
1840 | goto get_vma; | |
1841 | ||
1842 | case DT_JMPREL: | |
1843 | name = ".rela.plt"; | |
1844 | ||
1845 | get_vma: | |
1846 | s = bfd_get_section_by_name (output_bfd, name); | |
1847 | BFD_ASSERT (s != NULL); | |
1848 | dyn.d_un.d_ptr = s->vma; | |
1849 | break; | |
1850 | ||
1851 | case DT_RELASZ: | |
1852 | /* FIXME: This comment and code is from elf64-alpha.c: */ | |
1853 | /* My interpretation of the TIS v1.1 ELF document indicates | |
407443a3 | 1854 | that RELASZ should not include JMPREL. This is not what |
70256ad8 AJ |
1855 | the rest of the BFD does. It is, however, what the |
1856 | glibc ld.so wants. Do this fixup here until we found | |
1857 | out who is right. */ | |
1858 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); | |
1859 | if (s) | |
1860 | { | |
407443a3 | 1861 | /* Subtract JMPREL size from RELASZ. */ |
70256ad8 AJ |
1862 | dyn.d_un.d_val -= |
1863 | (s->_cooked_size ? s->_cooked_size : s->_raw_size); | |
1864 | } | |
1865 | break; | |
1866 | ||
1867 | case DT_PLTRELSZ: | |
1868 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); | |
1869 | BFD_ASSERT (s != NULL); | |
1870 | dyn.d_un.d_val = | |
1871 | (s->_cooked_size != 0 ? s->_cooked_size : s->_raw_size); | |
1872 | break; | |
1873 | } | |
70256ad8 AJ |
1874 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
1875 | } | |
1876 | ||
1877 | /* Initialize the contents of the .plt section. */ | |
407443a3 AJ |
1878 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
1879 | BFD_ASSERT (splt != NULL); | |
70256ad8 AJ |
1880 | if (splt->_raw_size > 0) |
1881 | { | |
653165cc | 1882 | /* Fill in the first entry in the procedure linkage table. */ |
407443a3 | 1883 | memcpy (splt->contents, elf64_x86_64_plt0_entry, PLT_ENTRY_SIZE); |
653165cc AJ |
1884 | /* Add offset for pushq GOT+8(%rip), since the instruction |
1885 | uses 6 bytes subtract this value. */ | |
1886 | bfd_put_32 (output_bfd, | |
1887 | (sgot->output_section->vma | |
1888 | + sgot->output_offset | |
1889 | + 8 | |
1890 | - splt->output_section->vma | |
1891 | - splt->output_offset | |
1892 | - 6), | |
1893 | splt->contents + 2); | |
1894 | /* Add offset for jmp *GOT+16(%rip). The 12 is the offset to | |
1895 | the end of the instruction. */ | |
1896 | bfd_put_32 (output_bfd, | |
1897 | (sgot->output_section->vma | |
1898 | + sgot->output_offset | |
1899 | + 16 | |
1900 | - splt->output_section->vma | |
1901 | - splt->output_offset | |
1902 | - 12), | |
1903 | splt->contents + 8); | |
1904 | ||
70256ad8 AJ |
1905 | } |
1906 | ||
1907 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = | |
1908 | PLT_ENTRY_SIZE; | |
1909 | } | |
1910 | ||
1911 | /* Set the first entry in the global offset table to the address of | |
1912 | the dynamic section. */ | |
70256ad8 AJ |
1913 | if (sgot->_raw_size > 0) |
1914 | { | |
1915 | if (sdyn == NULL) | |
1916 | bfd_put_64 (output_bfd, (bfd_vma) 0, sgot->contents); | |
1917 | else | |
1918 | bfd_put_64 (output_bfd, | |
1919 | sdyn->output_section->vma + sdyn->output_offset, | |
1920 | sgot->contents); | |
653165cc | 1921 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ |
70256ad8 AJ |
1922 | bfd_put_64 (output_bfd, (bfd_vma) 0, sgot->contents + GOT_ENTRY_SIZE); |
1923 | bfd_put_64 (output_bfd, (bfd_vma) 0, sgot->contents + GOT_ENTRY_SIZE*2); | |
1924 | } | |
1925 | ||
1926 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = | |
1927 | GOT_ENTRY_SIZE; | |
1928 | ||
8d88c4ca NC |
1929 | return true; |
1930 | } | |
1931 | ||
8df9fc9d | 1932 | static enum elf_reloc_type_class |
f51e552e AM |
1933 | elf64_x86_64_reloc_type_class (rela) |
1934 | const Elf_Internal_Rela *rela; | |
8df9fc9d | 1935 | { |
f51e552e | 1936 | switch ((int) ELF64_R_TYPE (rela->r_info)) |
8df9fc9d AJ |
1937 | { |
1938 | case R_X86_64_RELATIVE: | |
1939 | return reloc_class_relative; | |
1940 | case R_X86_64_JUMP_SLOT: | |
1941 | return reloc_class_plt; | |
1942 | case R_X86_64_COPY: | |
1943 | return reloc_class_copy; | |
1944 | default: | |
1945 | return reloc_class_normal; | |
1946 | } | |
1947 | } | |
1948 | ||
70256ad8 AJ |
1949 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec |
1950 | #define TARGET_LITTLE_NAME "elf64-x86-64" | |
1951 | #define ELF_ARCH bfd_arch_i386 | |
1952 | #define ELF_MACHINE_CODE EM_X86_64 | |
1953 | #define ELF_MAXPAGESIZE 0x100000 | |
1954 | ||
1955 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 1956 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
1957 | #define elf_backend_want_got_plt 1 |
1958 | #define elf_backend_plt_readonly 1 | |
1959 | #define elf_backend_want_plt_sym 0 | |
1960 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
1961 | #define elf_backend_plt_header_size PLT_ENTRY_SIZE | |
1962 | ||
1963 | #define elf_info_to_howto elf64_x86_64_info_to_howto | |
70256ad8 AJ |
1964 | |
1965 | #define bfd_elf64_bfd_final_link _bfd_elf64_gc_common_final_link | |
1966 | #define bfd_elf64_bfd_link_hash_table_create \ | |
1967 | elf64_x86_64_link_hash_table_create | |
407443a3 | 1968 | #define bfd_elf64_bfd_reloc_type_lookup elf64_x86_64_reloc_type_lookup |
70256ad8 AJ |
1969 | |
1970 | #define elf_backend_adjust_dynamic_symbol elf64_x86_64_adjust_dynamic_symbol | |
1971 | #define elf_backend_check_relocs elf64_x86_64_check_relocs | |
1972 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections | |
1973 | #define elf_backend_finish_dynamic_sections \ | |
1974 | elf64_x86_64_finish_dynamic_sections | |
1975 | #define elf_backend_finish_dynamic_symbol elf64_x86_64_finish_dynamic_symbol | |
1976 | #define elf_backend_gc_mark_hook elf64_x86_64_gc_mark_hook | |
1977 | #define elf_backend_gc_sweep_hook elf64_x86_64_gc_sweep_hook | |
1978 | #define elf_backend_relocate_section elf64_x86_64_relocate_section | |
1979 | #define elf_backend_size_dynamic_sections elf64_x86_64_size_dynamic_sections | |
407443a3 | 1980 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
8df9fc9d | 1981 | #define elf_backend_reloc_type_class elf64_x86_64_reloc_type_class |
8d88c4ca NC |
1982 | |
1983 | #include "elf64-target.h" |