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 *)); | |
8df9fc9d | 156 | static enum elf_reloc_type_class elf64_x86_64_reloc_type_class PARAMS ((int)); |
8d88c4ca NC |
157 | |
158 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
159 | static reloc_howto_type * | |
160 | elf64_x86_64_reloc_type_lookup (abfd, code) | |
161 | bfd *abfd ATTRIBUTE_UNUSED; | |
162 | bfd_reloc_code_real_type code; | |
163 | { | |
164 | unsigned int i; | |
165 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); | |
166 | i++) | |
167 | { | |
168 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
8da6118f KH |
169 | return &x86_64_elf_howto_table[(int) |
170 | x86_64_reloc_map[i].elf_reloc_val]; | |
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 | { | |
444 | if (h->got.refcount == -1) | |
445 | { | |
446 | h->got.refcount = 1; | |
447 | ||
448 | /* Make sure this symbol is output as a dynamic symbol. */ | |
449 | if (h->dynindx == -1) | |
450 | { | |
451 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) | |
452 | return false; | |
453 | } | |
454 | ||
455 | sgot->_raw_size += GOT_ENTRY_SIZE; | |
456 | srelgot->_raw_size += sizeof (Elf64_External_Rela); | |
457 | } | |
458 | else | |
459 | h->got.refcount += 1; | |
460 | } | |
461 | else | |
462 | { | |
463 | /* This is a global offset table entry for a local symbol. */ | |
464 | if (local_got_refcounts == NULL) | |
465 | { | |
dc810e39 | 466 | bfd_size_type size; |
70256ad8 | 467 | |
dc810e39 AM |
468 | size = symtab_hdr->sh_info; |
469 | size *= sizeof (bfd_signed_vma); | |
70256ad8 AJ |
470 | local_got_refcounts = ((bfd_signed_vma *) |
471 | bfd_alloc (abfd, size)); | |
472 | if (local_got_refcounts == NULL) | |
473 | return false; | |
474 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
dc810e39 | 475 | memset (local_got_refcounts, -1, (size_t) size); |
70256ad8 AJ |
476 | } |
477 | if (local_got_refcounts[r_symndx] == -1) | |
478 | { | |
479 | local_got_refcounts[r_symndx] = 1; | |
480 | ||
481 | sgot->_raw_size += GOT_ENTRY_SIZE; | |
482 | if (info->shared) | |
483 | { | |
484 | /* If we are generating a shared object, we need to | |
485 | output a R_X86_64_RELATIVE reloc so that the dynamic | |
486 | linker can adjust this GOT entry. */ | |
487 | srelgot->_raw_size += sizeof (Elf64_External_Rela); | |
488 | } | |
489 | } | |
490 | else | |
491 | local_got_refcounts[r_symndx] += 1; | |
492 | } | |
493 | break; | |
494 | ||
495 | case R_X86_64_PLT32: | |
496 | /* This symbol requires a procedure linkage table entry. We | |
407443a3 AJ |
497 | actually build the entry in adjust_dynamic_symbol, |
498 | because this might be a case of linking PIC code which is | |
499 | never referenced by a dynamic object, in which case we | |
500 | don't need to generate a procedure linkage table entry | |
501 | after all. */ | |
70256ad8 AJ |
502 | |
503 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 504 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
505 | if (h == NULL) |
506 | continue; | |
507 | ||
cc78d0af | 508 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
70256ad8 | 509 | if (h->plt.refcount == -1) |
cc78d0af | 510 | h->plt.refcount = 1; |
70256ad8 AJ |
511 | else |
512 | h->plt.refcount += 1; | |
513 | break; | |
514 | ||
cc78d0af AJ |
515 | case R_X86_64_8: |
516 | case R_X86_64_16: | |
70256ad8 | 517 | case R_X86_64_32: |
cc78d0af | 518 | case R_X86_64_64: |
70256ad8 AJ |
519 | case R_X86_64_32S: |
520 | case R_X86_64_PC32: | |
521 | if (h != NULL) | |
522 | h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; | |
523 | ||
524 | /* If we are creating a shared library, and this is a reloc | |
525 | against a global symbol, or a non PC relative reloc | |
526 | against a local symbol, then we need to copy the reloc | |
527 | into the shared library. However, if we are linking with | |
528 | -Bsymbolic, we do not need to copy a reloc against a | |
529 | global symbol which is defined in an object we are | |
407443a3 | 530 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
531 | this point we have not seen all the input files, so it is |
532 | possible that DEF_REGULAR is not set now but will be set | |
533 | later (it is never cleared). We account for that | |
534 | possibility below by storing information in the | |
535 | pcrel_relocs_copied field of the hash table entry. | |
536 | A similar situation occurs when creating shared libraries | |
537 | and symbol visibility changes render the symbol local. */ | |
538 | if (info->shared | |
539 | && (sec->flags & SEC_ALLOC) != 0 | |
cc78d0af AJ |
540 | && (((ELF64_R_TYPE (rel->r_info) != R_X86_64_PC8) |
541 | && (ELF64_R_TYPE (rel->r_info) != R_X86_64_PC16) | |
542 | && (ELF64_R_TYPE (rel->r_info) != R_X86_64_PC32)) | |
70256ad8 AJ |
543 | || (h != NULL |
544 | && (! info->symbolic | |
545 | || (h->elf_link_hash_flags | |
546 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
547 | { | |
548 | /* When creating a shared object, we must copy these | |
549 | reloc types into the output file. We create a reloc | |
550 | section in dynobj and make room for this reloc. */ | |
551 | if (sreloc == NULL) | |
552 | { | |
553 | const char *name; | |
554 | ||
555 | name = (bfd_elf_string_from_elf_section | |
556 | (abfd, | |
557 | elf_elfheader (abfd)->e_shstrndx, | |
558 | elf_section_data (sec)->rel_hdr.sh_name)); | |
559 | if (name == NULL) | |
560 | return false; | |
561 | ||
562 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 | |
563 | && strcmp (bfd_get_section_name (abfd, sec), | |
564 | name + 5) == 0); | |
565 | ||
566 | sreloc = bfd_get_section_by_name (dynobj, name); | |
567 | if (sreloc == NULL) | |
568 | { | |
569 | flagword flags; | |
570 | ||
571 | sreloc = bfd_make_section (dynobj, name); | |
572 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | |
573 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
574 | if ((sec->flags & SEC_ALLOC) != 0) | |
575 | flags |= SEC_ALLOC | SEC_LOAD; | |
576 | if (sreloc == NULL | |
577 | || ! bfd_set_section_flags (dynobj, sreloc, flags) | |
cc78d0af | 578 | || ! bfd_set_section_alignment (dynobj, sreloc, 3)) |
70256ad8 AJ |
579 | return false; |
580 | } | |
8df9fc9d AJ |
581 | if (sec->flags & SEC_READONLY) |
582 | info->flags |= DF_TEXTREL; | |
70256ad8 AJ |
583 | } |
584 | ||
585 | sreloc->_raw_size += sizeof (Elf64_External_Rela); | |
586 | ||
587 | /* If this is a global symbol, we count the number of PC | |
588 | relative relocations we have entered for this symbol, | |
589 | so that we can discard them later as necessary. Note | |
590 | that this function is only called if we are using an | |
591 | elf64_x86_64 linker hash table, which means that h is | |
592 | really a pointer to an elf64_x86_64_link_hash_entry. */ | |
cc78d0af AJ |
593 | if (h != NULL |
594 | && ((ELF64_R_TYPE (rel->r_info) == R_X86_64_PC8) | |
595 | || (ELF64_R_TYPE (rel->r_info) == R_X86_64_PC16) | |
596 | || (ELF64_R_TYPE (rel->r_info) == R_X86_64_PC32))) | |
70256ad8 AJ |
597 | { |
598 | struct elf64_x86_64_link_hash_entry *eh; | |
599 | struct elf64_x86_64_pcrel_relocs_copied *p; | |
600 | ||
601 | eh = (struct elf64_x86_64_link_hash_entry *) h; | |
602 | ||
603 | for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next) | |
604 | if (p->section == sreloc) | |
605 | break; | |
606 | ||
607 | if (p == NULL) | |
608 | { | |
609 | p = ((struct elf64_x86_64_pcrel_relocs_copied *) | |
dc810e39 | 610 | bfd_alloc (dynobj, (bfd_size_type) sizeof *p)); |
70256ad8 AJ |
611 | if (p == NULL) |
612 | return false; | |
613 | p->next = eh->pcrel_relocs_copied; | |
614 | eh->pcrel_relocs_copied = p; | |
615 | p->section = sreloc; | |
616 | p->count = 0; | |
617 | } | |
618 | ||
619 | ++p->count; | |
620 | } | |
621 | } | |
622 | break; | |
fe4770f4 AJ |
623 | |
624 | /* This relocation describes the C++ object vtable hierarchy. | |
625 | Reconstruct it for later use during GC. */ | |
626 | case R_X86_64_GNU_VTINHERIT: | |
627 | if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
628 | return false; | |
629 | break; | |
630 | ||
631 | /* This relocation describes which C++ vtable entries are actually | |
632 | used. Record for later use during GC. */ | |
633 | case R_X86_64_GNU_VTENTRY: | |
cc78d0af | 634 | if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
fe4770f4 AJ |
635 | return false; |
636 | break; | |
70256ad8 AJ |
637 | } |
638 | } | |
639 | ||
640 | return true; | |
641 | } | |
642 | ||
643 | /* Return the section that should be marked against GC for a given | |
407443a3 | 644 | relocation. */ |
70256ad8 AJ |
645 | |
646 | static asection * | |
647 | elf64_x86_64_gc_mark_hook (abfd, info, rel, h, sym) | |
648 | bfd *abfd; | |
649 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
650 | Elf_Internal_Rela *rel ATTRIBUTE_UNUSED; | |
651 | struct elf_link_hash_entry *h; | |
652 | Elf_Internal_Sym *sym; | |
653 | { | |
654 | if (h != NULL) | |
655 | { | |
fe4770f4 | 656 | switch (ELF64_R_TYPE (rel->r_info)) |
70256ad8 | 657 | { |
fe4770f4 AJ |
658 | case R_X86_64_GNU_VTINHERIT: |
659 | case R_X86_64_GNU_VTENTRY: | |
660 | break; | |
70256ad8 AJ |
661 | |
662 | default: | |
fe4770f4 AJ |
663 | switch (h->root.type) |
664 | { | |
665 | case bfd_link_hash_defined: | |
666 | case bfd_link_hash_defweak: | |
667 | return h->root.u.def.section; | |
668 | ||
669 | case bfd_link_hash_common: | |
670 | return h->root.u.c.p->section; | |
671 | ||
672 | default: | |
673 | break; | |
674 | } | |
70256ad8 AJ |
675 | } |
676 | } | |
677 | else | |
678 | { | |
679 | if (!(elf_bad_symtab (abfd) | |
680 | && ELF_ST_BIND (sym->st_info) != STB_LOCAL) | |
681 | && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) | |
682 | && sym->st_shndx != SHN_COMMON)) | |
683 | { | |
684 | return bfd_section_from_elf_index (abfd, sym->st_shndx); | |
685 | } | |
686 | } | |
687 | ||
688 | return NULL; | |
689 | } | |
690 | ||
407443a3 | 691 | /* Update the got entry reference counts for the section being removed. */ |
70256ad8 AJ |
692 | |
693 | static boolean | |
694 | elf64_x86_64_gc_sweep_hook (abfd, info, sec, relocs) | |
695 | bfd *abfd; | |
696 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
697 | asection *sec; | |
698 | const Elf_Internal_Rela *relocs; | |
699 | { | |
700 | Elf_Internal_Shdr *symtab_hdr; | |
701 | struct elf_link_hash_entry **sym_hashes; | |
702 | bfd_signed_vma *local_got_refcounts; | |
703 | const Elf_Internal_Rela *rel, *relend; | |
704 | unsigned long r_symndx; | |
705 | struct elf_link_hash_entry *h; | |
706 | bfd *dynobj; | |
707 | asection *sgot; | |
708 | asection *srelgot; | |
709 | ||
710 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
711 | sym_hashes = elf_sym_hashes (abfd); | |
712 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
713 | ||
714 | dynobj = elf_hash_table (info)->dynobj; | |
715 | if (dynobj == NULL) | |
716 | return true; | |
717 | ||
718 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
719 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
720 | ||
721 | relend = relocs + sec->reloc_count; | |
722 | for (rel = relocs; rel < relend; rel++) | |
723 | switch (ELF64_R_TYPE (rel->r_info)) | |
724 | { | |
725 | case R_X86_64_GOT32: | |
726 | case R_X86_64_GOTPCREL: | |
727 | r_symndx = ELF64_R_SYM (rel->r_info); | |
728 | if (r_symndx >= symtab_hdr->sh_info) | |
729 | { | |
730 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
731 | if (h->got.refcount > 0) | |
732 | { | |
733 | h->got.refcount -= 1; | |
734 | if (h->got.refcount == 0) | |
735 | { | |
736 | sgot->_raw_size -= GOT_ENTRY_SIZE; | |
737 | srelgot->_raw_size -= sizeof (Elf64_External_Rela); | |
738 | } | |
739 | } | |
740 | } | |
741 | else if (local_got_refcounts != NULL) | |
742 | { | |
743 | if (local_got_refcounts[r_symndx] > 0) | |
744 | { | |
745 | local_got_refcounts[r_symndx] -= 1; | |
746 | if (local_got_refcounts[r_symndx] == 0) | |
747 | { | |
748 | sgot->_raw_size -= GOT_ENTRY_SIZE; | |
749 | if (info->shared) | |
750 | srelgot->_raw_size -= sizeof (Elf64_External_Rela); | |
751 | } | |
752 | } | |
753 | } | |
754 | break; | |
755 | ||
756 | case R_X86_64_PLT32: | |
757 | r_symndx = ELF64_R_SYM (rel->r_info); | |
758 | if (r_symndx >= symtab_hdr->sh_info) | |
759 | { | |
760 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
761 | if (h->plt.refcount > 0) | |
762 | h->plt.refcount -= 1; | |
763 | } | |
764 | break; | |
765 | ||
766 | default: | |
767 | break; | |
768 | } | |
769 | ||
770 | return true; | |
771 | } | |
772 | ||
773 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
774 | regular object. The current definition is in some section of the | |
775 | dynamic object, but we're not including those sections. We have to | |
776 | change the definition to something the rest of the link can | |
407443a3 | 777 | understand. */ |
70256ad8 AJ |
778 | |
779 | static boolean | |
780 | elf64_x86_64_adjust_dynamic_symbol (info, h) | |
781 | struct bfd_link_info *info; | |
782 | struct elf_link_hash_entry *h; | |
783 | { | |
784 | bfd *dynobj; | |
785 | asection *s; | |
786 | unsigned int power_of_two; | |
787 | ||
788 | dynobj = elf_hash_table (info)->dynobj; | |
789 | ||
790 | /* Make sure we know what is going on here. */ | |
791 | BFD_ASSERT (dynobj != NULL | |
792 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) | |
793 | || h->weakdef != NULL | |
794 | || ((h->elf_link_hash_flags | |
795 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
796 | && (h->elf_link_hash_flags | |
797 | & ELF_LINK_HASH_REF_REGULAR) != 0 | |
798 | && (h->elf_link_hash_flags | |
799 | & ELF_LINK_HASH_DEF_REGULAR) == 0))); | |
800 | ||
801 | /* If this is a function, put it in the procedure linkage table. We | |
802 | will fill in the contents of the procedure linkage table later, | |
803 | when we know the address of the .got section. */ | |
804 | if (h->type == STT_FUNC | |
805 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) | |
806 | { | |
407443a3 AJ |
807 | if ((! info->shared |
808 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
809 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0) | |
810 | || (info->shared && h->plt.refcount <= 0)) | |
70256ad8 | 811 | { |
70256ad8 AJ |
812 | /* This case can occur if we saw a PLT32 reloc in an input |
813 | file, but the symbol was never referred to by a dynamic | |
814 | object, or if all references were garbage collected. In | |
815 | such a case, we don't actually need to build a procedure | |
816 | linkage table, and we can just do a PC32 reloc instead. */ | |
70256ad8 AJ |
817 | h->plt.offset = (bfd_vma) -1; |
818 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
819 | return true; | |
820 | } | |
821 | ||
822 | /* Make sure this symbol is output as a dynamic symbol. */ | |
823 | if (h->dynindx == -1) | |
824 | { | |
825 | if (! bfd_elf64_link_record_dynamic_symbol (info, h)) | |
826 | return false; | |
827 | } | |
828 | ||
829 | s = bfd_get_section_by_name (dynobj, ".plt"); | |
830 | BFD_ASSERT (s != NULL); | |
831 | ||
832 | /* If this is the first .plt entry, make room for the special | |
833 | first entry. */ | |
834 | if (s->_raw_size == 0) | |
835 | s->_raw_size = PLT_ENTRY_SIZE; | |
836 | ||
837 | /* If this symbol is not defined in a regular file, and we are | |
838 | not generating a shared library, then set the symbol to this | |
407443a3 | 839 | location in the .plt. This is required to make function |
70256ad8 AJ |
840 | pointers compare as equal between the normal executable and |
841 | the shared library. */ | |
842 | if (! info->shared | |
843 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
844 | { | |
845 | h->root.u.def.section = s; | |
846 | h->root.u.def.value = s->_raw_size; | |
847 | } | |
848 | ||
849 | h->plt.offset = s->_raw_size; | |
850 | ||
851 | /* Make room for this entry. */ | |
852 | s->_raw_size += PLT_ENTRY_SIZE; | |
853 | ||
407443a3 AJ |
854 | /* We also need to make an entry in the .got.plt section, which |
855 | will be placed in the .got section by the linker script. */ | |
856 | s = bfd_get_section_by_name (dynobj, ".got.plt"); | |
857 | BFD_ASSERT (s != NULL); | |
858 | s->_raw_size += GOT_ENTRY_SIZE; | |
859 | ||
70256ad8 AJ |
860 | /* We also need to make an entry in the .rela.plt section. */ |
861 | s = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
862 | BFD_ASSERT (s != NULL); | |
863 | s->_raw_size += sizeof (Elf64_External_Rela); | |
864 | ||
865 | return true; | |
866 | } | |
867 | ||
868 | /* If this is a weak symbol, and there is a real definition, the | |
869 | processor independent code will have arranged for us to see the | |
407443a3 | 870 | real definition first, and we can just use the same value. */ |
70256ad8 AJ |
871 | if (h->weakdef != NULL) |
872 | { | |
873 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
874 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
875 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
876 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
877 | return true; | |
878 | } | |
879 | ||
880 | /* This is a reference to a symbol defined by a dynamic object which | |
407443a3 | 881 | is not a function. */ |
70256ad8 AJ |
882 | |
883 | /* If we are creating a shared library, we must presume that the | |
884 | only references to the symbol are via the global offset table. | |
885 | For such cases we need not do anything here; the relocations will | |
407443a3 | 886 | be handled correctly by relocate_section. */ |
70256ad8 AJ |
887 | if (info->shared) |
888 | return true; | |
889 | ||
890 | /* If there are no references to this symbol that do not use the | |
891 | GOT, we don't need to generate a copy reloc. */ | |
892 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) | |
893 | return true; | |
894 | ||
895 | /* We must allocate the symbol in our .dynbss section, which will | |
407443a3 | 896 | become part of the .bss section of the executable. There will be |
70256ad8 AJ |
897 | an entry for this symbol in the .dynsym section. The dynamic |
898 | object will contain position independent code, so all references | |
899 | from the dynamic object to this symbol will go through the global | |
900 | offset table. The dynamic linker will use the .dynsym entry to | |
901 | determine the address it must put in the global offset table, so | |
902 | both the dynamic object and the regular object will refer to the | |
903 | same memory location for the variable. */ | |
904 | ||
905 | s = bfd_get_section_by_name (dynobj, ".dynbss"); | |
906 | BFD_ASSERT (s != NULL); | |
907 | ||
908 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker | |
909 | to copy the initial value out of the dynamic object and into the | |
910 | runtime process image. We need to remember the offset into the | |
911 | .rela.bss section we are going to use. */ | |
912 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
913 | { | |
914 | asection *srel; | |
915 | ||
916 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
917 | BFD_ASSERT (srel != NULL); | |
918 | srel->_raw_size += sizeof (Elf64_External_Rela); | |
919 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; | |
920 | } | |
921 | ||
922 | /* We need to figure out the alignment required for this symbol. I | |
407443a3 | 923 | have no idea how ELF linkers handle this. 16-bytes is the size |
70256ad8 AJ |
924 | of the largest type that requires hard alignment -- long double. */ |
925 | /* FIXME: This is VERY ugly. Should be fixed for all architectures using | |
926 | this construct. */ | |
927 | power_of_two = bfd_log2 (h->size); | |
928 | if (power_of_two > 4) | |
929 | power_of_two = 4; | |
930 | ||
931 | /* Apply the required alignment. */ | |
932 | s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two)); | |
933 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) | |
934 | { | |
935 | if (! bfd_set_section_alignment (dynobj, s, power_of_two)) | |
936 | return false; | |
937 | } | |
938 | ||
939 | /* Define the symbol as being at this point in the section. */ | |
940 | h->root.u.def.section = s; | |
941 | h->root.u.def.value = s->_raw_size; | |
942 | ||
943 | /* Increment the section size to make room for the symbol. */ | |
944 | s->_raw_size += h->size; | |
945 | ||
946 | return true; | |
947 | } | |
948 | ||
949 | /* Set the sizes of the dynamic sections. */ | |
950 | ||
951 | static boolean | |
952 | elf64_x86_64_size_dynamic_sections (output_bfd, info) | |
8df9fc9d | 953 | bfd *output_bfd ATTRIBUTE_UNUSED; |
70256ad8 AJ |
954 | struct bfd_link_info *info; |
955 | { | |
956 | bfd *dynobj; | |
957 | asection *s; | |
958 | boolean plt; | |
959 | boolean relocs; | |
70256ad8 AJ |
960 | |
961 | dynobj = elf_hash_table (info)->dynobj; | |
962 | BFD_ASSERT (dynobj != NULL); | |
963 | ||
964 | if (elf_hash_table (info)->dynamic_sections_created) | |
965 | { | |
966 | /* Set the contents of the .interp section to the interpreter. */ | |
967 | if (! info->shared) | |
968 | { | |
969 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
970 | BFD_ASSERT (s != NULL); | |
971 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; | |
972 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
973 | } | |
974 | } | |
975 | else | |
976 | { | |
977 | /* We may have created entries in the .rela.got section. | |
407443a3 AJ |
978 | However, if we are not creating the dynamic sections, we will |
979 | not actually use these entries. Reset the size of .rela.got, | |
980 | which will cause it to get stripped from the output file | |
981 | below. */ | |
70256ad8 AJ |
982 | s = bfd_get_section_by_name (dynobj, ".rela.got"); |
983 | if (s != NULL) | |
984 | s->_raw_size = 0; | |
985 | } | |
986 | ||
987 | /* If this is a -Bsymbolic shared link, then we need to discard all | |
988 | PC relative relocs against symbols defined in a regular object. | |
989 | We allocated space for them in the check_relocs routine, but we | |
990 | will not fill them in in the relocate_section routine. */ | |
991 | if (info->shared) | |
992 | elf64_x86_64_link_hash_traverse (elf64_x86_64_hash_table (info), | |
993 | elf64_x86_64_discard_copies, | |
994 | (PTR) info); | |
995 | ||
996 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
997 | determined the sizes of the various dynamic sections. Allocate | |
998 | memory for them. */ | |
8df9fc9d | 999 | plt = relocs = false; |
70256ad8 AJ |
1000 | for (s = dynobj->sections; s != NULL; s = s->next) |
1001 | { | |
1002 | const char *name; | |
1003 | boolean strip; | |
1004 | ||
1005 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
1006 | continue; | |
1007 | ||
1008 | /* It's OK to base decisions on the section name, because none | |
1009 | of the dynobj section names depend upon the input files. */ | |
1010 | name = bfd_get_section_name (dynobj, s); | |
1011 | ||
1012 | strip = false; | |
1013 | if (strcmp (name, ".plt") == 0) | |
1014 | { | |
1015 | if (s->_raw_size == 0) | |
1016 | { | |
1017 | /* Strip this section if we don't need it; see the | |
407443a3 | 1018 | comment below. */ |
70256ad8 AJ |
1019 | strip = true; |
1020 | } | |
1021 | else | |
1022 | { | |
1023 | /* Remember whether there is a PLT. */ | |
1024 | plt = true; | |
1025 | } | |
1026 | } | |
1027 | else if (strncmp (name, ".rela", 5) == 0) | |
1028 | { | |
1029 | if (s->_raw_size == 0) | |
1030 | { | |
1031 | /* If we don't need this section, strip it from the | |
1032 | output file. This is mostly to handle .rela.bss and | |
1033 | .rela.plt. We must create both sections in | |
1034 | create_dynamic_sections, because they must be created | |
1035 | before the linker maps input sections to output | |
1036 | sections. The linker does that before | |
1037 | adjust_dynamic_symbol is called, and it is that | |
1038 | function which decides whether anything needs to go | |
1039 | into these sections. */ | |
1040 | strip = true; | |
1041 | } | |
1042 | else | |
1043 | { | |
70256ad8 | 1044 | if (strcmp (name, ".rela.plt") != 0) |
8df9fc9d | 1045 | relocs = true; |
70256ad8 AJ |
1046 | |
1047 | /* We use the reloc_count field as a counter if we need | |
1048 | to copy relocs into the output file. */ | |
1049 | s->reloc_count = 0; | |
1050 | } | |
1051 | } | |
1052 | else if (strncmp (name, ".got", 4) != 0) | |
1053 | { | |
1054 | /* It's not one of our sections, so don't allocate space. */ | |
1055 | continue; | |
1056 | } | |
1057 | ||
1058 | if (strip) | |
1059 | { | |
1060 | _bfd_strip_section_from_output (info, s); | |
1061 | continue; | |
1062 | } | |
1063 | ||
1064 | /* Allocate memory for the section contents. We use bfd_zalloc | |
1065 | here in case unused entries are not reclaimed before the | |
1066 | section's contents are written out. This should not happen, | |
1067 | but this way if it does, we get a R_X86_64_NONE reloc instead | |
1068 | of garbage. */ | |
1069 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); | |
1070 | if (s->contents == NULL && s->_raw_size != 0) | |
1071 | return false; | |
1072 | } | |
1073 | ||
1074 | if (elf_hash_table (info)->dynamic_sections_created) | |
1075 | { | |
1076 | /* Add some entries to the .dynamic section. We fill in the | |
1077 | values later, in elf64_x86_64_finish_dynamic_sections, but we | |
1078 | must add the entries now so that we get the correct size for | |
407443a3 | 1079 | the .dynamic section. The DT_DEBUG entry is filled in by the |
70256ad8 | 1080 | dynamic linker and used by the debugger. */ |
dc810e39 AM |
1081 | #define add_dynamic_entry(TAG, VAL) \ |
1082 | bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) | |
1083 | ||
70256ad8 AJ |
1084 | if (! info->shared) |
1085 | { | |
dc810e39 | 1086 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
70256ad8 AJ |
1087 | return false; |
1088 | } | |
1089 | ||
1090 | if (plt) | |
1091 | { | |
dc810e39 AM |
1092 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
1093 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
1094 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
1095 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
70256ad8 AJ |
1096 | return false; |
1097 | } | |
1098 | ||
1099 | if (relocs) | |
1100 | { | |
dc810e39 AM |
1101 | if (!add_dynamic_entry (DT_RELA, 0) |
1102 | || !add_dynamic_entry (DT_RELASZ, 0) | |
1103 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) | |
70256ad8 AJ |
1104 | return false; |
1105 | } | |
1106 | ||
8df9fc9d | 1107 | if ((info->flags & DF_TEXTREL) != 0) |
70256ad8 | 1108 | { |
dc810e39 | 1109 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
70256ad8 | 1110 | return false; |
70256ad8 AJ |
1111 | } |
1112 | } | |
dc810e39 | 1113 | #undef add_dynamic_entry |
70256ad8 AJ |
1114 | |
1115 | return true; | |
1116 | } | |
1117 | ||
1118 | /* This function is called via elf64_x86_64_link_hash_traverse if we are | |
1119 | creating a shared object. In the -Bsymbolic case, it discards the | |
1120 | space allocated to copy PC relative relocs against symbols which | |
1121 | are defined in regular objects. For the normal non-symbolic case, | |
1122 | we also discard space for relocs that have become local due to | |
1123 | symbol visibility changes. We allocated space for them in the | |
1124 | check_relocs routine, but we won't fill them in in the | |
1125 | relocate_section routine. */ | |
1126 | ||
1127 | static boolean | |
1128 | elf64_x86_64_discard_copies (h, inf) | |
1129 | struct elf64_x86_64_link_hash_entry *h; | |
1130 | PTR inf; | |
1131 | { | |
1132 | struct elf64_x86_64_pcrel_relocs_copied *s; | |
1133 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
1134 | ||
1135 | /* If a symbol has been forced local or we have found a regular | |
1136 | definition for the symbolic link case, then we won't be needing | |
1137 | any relocs. */ | |
1138 | if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
1139 | && ((h->root.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 | |
1140 | || info->symbolic)) | |
1141 | { | |
1142 | for (s = h->pcrel_relocs_copied; s != NULL; s = s->next) | |
1143 | s->section->_raw_size -= s->count * sizeof (Elf64_External_Rela); | |
1144 | } | |
1145 | ||
1146 | return true; | |
1147 | } | |
1148 | ||
8d88c4ca NC |
1149 | /* Relocate an x86_64 ELF section. */ |
1150 | ||
1151 | static boolean | |
1152 | elf64_x86_64_relocate_section (output_bfd, info, input_bfd, input_section, | |
fe4770f4 | 1153 | contents, relocs, local_syms, local_sections) |
8d88c4ca NC |
1154 | bfd *output_bfd; |
1155 | struct bfd_link_info *info; | |
1156 | bfd *input_bfd; | |
1157 | asection *input_section; | |
1158 | bfd_byte *contents; | |
1159 | Elf_Internal_Rela *relocs; | |
1160 | Elf_Internal_Sym *local_syms; | |
1161 | asection **local_sections; | |
1162 | { | |
1163 | bfd *dynobj; | |
1164 | Elf_Internal_Shdr *symtab_hdr; | |
1165 | struct elf_link_hash_entry **sym_hashes; | |
1166 | bfd_vma *local_got_offsets; | |
70256ad8 AJ |
1167 | asection *sgot; |
1168 | asection *splt; | |
8d88c4ca | 1169 | asection *sreloc; |
70256ad8 | 1170 | Elf_Internal_Rela *rela; |
8d88c4ca NC |
1171 | Elf_Internal_Rela *relend; |
1172 | ||
1173 | dynobj = elf_hash_table (info)->dynobj; | |
1174 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
1175 | sym_hashes = elf_sym_hashes (input_bfd); | |
1176 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
1177 | ||
70256ad8 | 1178 | sreloc = splt = sgot = NULL; |
8d88c4ca | 1179 | if (dynobj != NULL) |
70256ad8 AJ |
1180 | { |
1181 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1182 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1183 | } | |
8d88c4ca | 1184 | |
70256ad8 | 1185 | rela = relocs; |
8d88c4ca | 1186 | relend = relocs + input_section->reloc_count; |
70256ad8 | 1187 | for (; rela < relend; rela++) |
8d88c4ca NC |
1188 | { |
1189 | int r_type; | |
1190 | reloc_howto_type *howto; | |
1191 | unsigned long r_symndx; | |
1192 | struct elf_link_hash_entry *h; | |
1193 | Elf_Internal_Sym *sym; | |
1194 | asection *sec; | |
1195 | bfd_vma relocation; | |
1196 | bfd_reloc_status_type r; | |
1197 | unsigned int indx; | |
1198 | ||
70256ad8 | 1199 | r_type = ELF64_R_TYPE (rela->r_info); |
fe4770f4 AJ |
1200 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
1201 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
1202 | continue; | |
8d88c4ca NC |
1203 | |
1204 | if ((indx = (unsigned) r_type) >= R_X86_64_max) | |
8da6118f KH |
1205 | { |
1206 | bfd_set_error (bfd_error_bad_value); | |
1207 | return false; | |
1208 | } | |
8d88c4ca NC |
1209 | howto = x86_64_elf_howto_table + indx; |
1210 | ||
70256ad8 | 1211 | r_symndx = ELF64_R_SYM (rela->r_info); |
8d88c4ca NC |
1212 | |
1213 | if (info->relocateable) | |
8da6118f KH |
1214 | { |
1215 | /* This is a relocateable link. We don't have to change | |
1216 | anything, unless the reloc is against a section symbol, | |
1217 | in which case we have to adjust according to where the | |
1218 | section symbol winds up in the output section. */ | |
1219 | if (r_symndx < symtab_hdr->sh_info) | |
1220 | { | |
1221 | sym = local_syms + r_symndx; | |
1222 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1223 | { | |
1224 | sec = local_sections[r_symndx]; | |
70256ad8 | 1225 | rela->r_addend += sec->output_offset + sym->st_value; |
8da6118f KH |
1226 | } |
1227 | } | |
1228 | ||
1229 | continue; | |
1230 | } | |
8d88c4ca | 1231 | |
407443a3 | 1232 | /* This is a final link. */ |
8d88c4ca NC |
1233 | h = NULL; |
1234 | sym = NULL; | |
1235 | sec = NULL; | |
1236 | if (r_symndx < symtab_hdr->sh_info) | |
8da6118f KH |
1237 | { |
1238 | sym = local_syms + r_symndx; | |
1239 | sec = local_sections[r_symndx]; | |
1240 | relocation = (sec->output_section->vma | |
1241 | + sec->output_offset | |
1242 | + sym->st_value); | |
1243 | } | |
8d88c4ca | 1244 | else |
8da6118f KH |
1245 | { |
1246 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1247 | while (h->root.type == bfd_link_hash_indirect | |
1248 | || h->root.type == bfd_link_hash_warning) | |
1249 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1250 | if (h->root.type == bfd_link_hash_defined | |
1251 | || h->root.type == bfd_link_hash_defweak) | |
1252 | { | |
1253 | sec = h->root.u.def.section; | |
6a2bda3f AJ |
1254 | if ((r_type == R_X86_64_PLT32 |
1255 | && splt != NULL | |
1256 | && h->plt.offset != (bfd_vma) -1) | |
1257 | || ((r_type == R_X86_64_GOT32 || r_type == R_X86_64_GOTPCREL) | |
bcdd92f3 AJ |
1258 | && elf_hash_table (info)->dynamic_sections_created |
1259 | && (!info->shared | |
1260 | || (! info->symbolic && h->dynindx != -1) | |
1261 | || (h->elf_link_hash_flags | |
1262 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
1263 | || (info->shared | |
1264 | && ((! info->symbolic && h->dynindx != -1) | |
1265 | || (h->elf_link_hash_flags | |
1266 | & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
80643fbc AJ |
1267 | && (r_type == R_X86_64_8 |
1268 | || r_type == R_X86_64_16 | |
1269 | || r_type == R_X86_64_32 | |
1270 | || r_type == R_X86_64_64 | |
1271 | || r_type == R_X86_64_PC8 | |
1272 | || r_type == R_X86_64_PC16 | |
1273 | || r_type == R_X86_64_PC32) | |
bcdd92f3 AJ |
1274 | && ((input_section->flags & SEC_ALLOC) != 0 |
1275 | /* DWARF will emit R_X86_64_32 relocations in its | |
1276 | sections against symbols defined externally | |
1277 | in shared libraries. We can't do anything | |
1278 | with them here. */ | |
1279 | || ((input_section->flags & SEC_DEBUGGING) != 0 | |
1280 | && (h->elf_link_hash_flags | |
1281 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0)))) | |
1282 | { | |
1283 | /* In these cases, we don't need the relocation | |
1284 | value. We check specially because in some | |
1285 | obscure cases sec->output_section will be NULL. */ | |
1286 | relocation = 0; | |
1287 | } | |
1288 | else if (sec->output_section == NULL) | |
8da6118f KH |
1289 | { |
1290 | (*_bfd_error_handler) | |
1291 | (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"), | |
8f615d07 | 1292 | bfd_archive_filename (input_bfd), h->root.root.string, |
8da6118f KH |
1293 | bfd_get_section_name (input_bfd, input_section)); |
1294 | relocation = 0; | |
1295 | } | |
1296 | else | |
1297 | relocation = (h->root.u.def.value | |
1298 | + sec->output_section->vma | |
1299 | + sec->output_offset); | |
1300 | } | |
1301 | else if (h->root.type == bfd_link_hash_undefweak) | |
1302 | relocation = 0; | |
671bae9c NC |
1303 | else if (info->shared |
1304 | && (!info->symbolic || info->allow_shlib_undefined) | |
1305 | && !info->no_undefined | |
70256ad8 AJ |
1306 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) |
1307 | relocation = 0; | |
8da6118f KH |
1308 | else |
1309 | { | |
1310 | if (! ((*info->callbacks->undefined_symbol) | |
1311 | (info, h->root.root.string, input_bfd, | |
70256ad8 | 1312 | input_section, rela->r_offset, |
8da6118f KH |
1313 | (!info->shared || info->no_undefined |
1314 | || ELF_ST_VISIBILITY (h->other))))) | |
1315 | return false; | |
1316 | relocation = 0; | |
1317 | } | |
1318 | } | |
70256ad8 AJ |
1319 | |
1320 | /* When generating a shared object, the relocations handled here are | |
1321 | copied into the output file to be resolved at run time. */ | |
1322 | switch (r_type) | |
1323 | { | |
1324 | case R_X86_64_GOT32: | |
1325 | /* Relocation is to the entry for this symbol in the global | |
1326 | offset table. */ | |
70256ad8 AJ |
1327 | case R_X86_64_GOTPCREL: |
1328 | /* Use global offset table as symbol value. */ | |
51e0a107 | 1329 | BFD_ASSERT (sgot != NULL); |
053579d7 | 1330 | |
51e0a107 | 1331 | if (h != NULL) |
70256ad8 | 1332 | { |
51e0a107 JH |
1333 | bfd_vma off = h->got.offset; |
1334 | BFD_ASSERT (off != (bfd_vma) -1); | |
1335 | ||
1336 | if (! elf_hash_table (info)->dynamic_sections_created | |
1337 | || (info->shared | |
1338 | && (info->symbolic || h->dynindx == -1) | |
1339 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) | |
1340 | { | |
1341 | /* This is actually a static link, or it is a -Bsymbolic | |
1342 | link and the symbol is defined locally, or the symbol | |
407443a3 | 1343 | was forced to be local because of a version file. We |
51e0a107 JH |
1344 | must initialize this entry in the global offset table. |
1345 | Since the offset must always be a multiple of 8, we | |
1346 | use the least significant bit to record whether we | |
1347 | have initialized it already. | |
1348 | ||
1349 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
1350 | relocation entry to initialize the value. This is |
1351 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
1352 | if ((off & 1) != 0) |
1353 | off &= ~1; | |
1354 | else | |
1355 | { | |
1356 | bfd_put_64 (output_bfd, relocation, | |
1357 | sgot->contents + off); | |
1358 | h->got.offset |= 1; | |
1359 | } | |
1360 | } | |
053579d7 AJ |
1361 | if (r_type == R_X86_64_GOTPCREL) |
1362 | relocation = sgot->output_section->vma + sgot->output_offset + off; | |
1363 | else | |
1364 | relocation = sgot->output_offset + off; | |
70256ad8 | 1365 | } |
51e0a107 JH |
1366 | else |
1367 | { | |
1368 | bfd_vma off; | |
70256ad8 | 1369 | |
51e0a107 JH |
1370 | BFD_ASSERT (local_got_offsets != NULL |
1371 | && local_got_offsets[r_symndx] != (bfd_vma) -1); | |
1372 | ||
1373 | off = local_got_offsets[r_symndx]; | |
1374 | ||
1375 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
1376 | the least significant bit to record whether we have |
1377 | already generated the necessary reloc. */ | |
51e0a107 JH |
1378 | if ((off & 1) != 0) |
1379 | off &= ~1; | |
1380 | else | |
1381 | { | |
1382 | bfd_put_64 (output_bfd, relocation, sgot->contents + off); | |
1383 | ||
1384 | if (info->shared) | |
1385 | { | |
1386 | asection *srelgot; | |
1387 | Elf_Internal_Rela outrel; | |
70256ad8 | 1388 | |
51e0a107 JH |
1389 | /* We need to generate a R_X86_64_RELATIVE reloc |
1390 | for the dynamic linker. */ | |
1391 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1392 | BFD_ASSERT (srelgot != NULL); | |
1393 | ||
1394 | outrel.r_offset = (sgot->output_section->vma | |
1395 | + sgot->output_offset | |
1396 | + off); | |
1397 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); | |
1398 | outrel.r_addend = relocation; | |
1399 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, | |
1400 | (((Elf64_External_Rela *) | |
1401 | srelgot->contents) | |
1402 | + srelgot->reloc_count)); | |
1403 | ++srelgot->reloc_count; | |
1404 | } | |
1405 | ||
1406 | local_got_offsets[r_symndx] |= 1; | |
1407 | } | |
1408 | ||
053579d7 AJ |
1409 | if (r_type == R_X86_64_GOTPCREL) |
1410 | relocation = sgot->output_section->vma + sgot->output_offset + off; | |
1411 | else | |
1412 | relocation = sgot->output_offset + off; | |
51e0a107 | 1413 | } |
6a2bda3f | 1414 | |
70256ad8 AJ |
1415 | break; |
1416 | ||
1417 | case R_X86_64_PLT32: | |
1418 | /* Relocation is to the entry for this symbol in the | |
1419 | procedure linkage table. */ | |
1420 | ||
1421 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 1422 | without using the procedure linkage table. */ |
70256ad8 AJ |
1423 | if (h == NULL) |
1424 | break; | |
1425 | ||
1426 | if (h->plt.offset == (bfd_vma) -1 || splt == NULL) | |
1427 | { | |
1428 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
1429 | happens when statically linking PIC code, or when |
1430 | using -Bsymbolic. */ | |
70256ad8 AJ |
1431 | break; |
1432 | } | |
1433 | ||
1434 | relocation = (splt->output_section->vma | |
1435 | + splt->output_offset | |
1436 | + h->plt.offset); | |
1437 | break; | |
1438 | ||
fd8ab9e5 AJ |
1439 | case R_X86_64_PC8: |
1440 | case R_X86_64_PC16: | |
1441 | case R_X86_64_PC32: | |
f631948d AJ |
1442 | if (h == NULL || h->dynindx == -1 |
1443 | || (info->symbolic | |
1444 | && h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) | |
fd8ab9e5 AJ |
1445 | break; |
1446 | /* Fall through. */ | |
70256ad8 AJ |
1447 | case R_X86_64_8: |
1448 | case R_X86_64_16: | |
1449 | case R_X86_64_32: | |
6b3db546 | 1450 | case R_X86_64_64: |
80643fbc | 1451 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 1452 | the same when it's zeroextended to 64 bit. */ |
f631948d | 1453 | if (info->shared && (input_section->flags & SEC_ALLOC) != 0) |
70256ad8 AJ |
1454 | { |
1455 | Elf_Internal_Rela outrel; | |
1456 | boolean skip, relocate; | |
1457 | ||
1458 | /* When generating a shared object, these relocations | |
1459 | are copied into the output file to be resolved at run | |
407443a3 | 1460 | time. */ |
70256ad8 AJ |
1461 | |
1462 | if (sreloc == NULL) | |
1463 | { | |
1464 | const char *name; | |
1465 | ||
1466 | name = (bfd_elf_string_from_elf_section | |
1467 | (input_bfd, | |
1468 | elf_elfheader (input_bfd)->e_shstrndx, | |
1469 | elf_section_data (input_section)->rel_hdr.sh_name)); | |
1470 | if (name == NULL) | |
1471 | return false; | |
1472 | ||
1473 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 | |
1474 | && strcmp (bfd_get_section_name (input_bfd, | |
1475 | input_section), | |
1476 | name + 5) == 0); | |
1477 | ||
1478 | sreloc = bfd_get_section_by_name (dynobj, name); | |
1479 | BFD_ASSERT (sreloc != NULL); | |
1480 | } | |
1481 | ||
1482 | skip = false; | |
1483 | ||
1484 | if (elf_section_data (input_section)->stab_info == NULL) | |
1485 | outrel.r_offset = rela->r_offset; | |
1486 | else | |
1487 | { | |
1488 | bfd_vma off; | |
1489 | ||
1490 | off = (_bfd_stab_section_offset | |
1491 | (output_bfd, &elf_hash_table (info)->stab_info, | |
1492 | input_section, | |
1493 | &elf_section_data (input_section)->stab_info, | |
1494 | rela->r_offset)); | |
1495 | if (off == (bfd_vma) -1) | |
1496 | skip = true; | |
1497 | outrel.r_offset = off; | |
1498 | } | |
1499 | ||
1500 | outrel.r_offset += (input_section->output_section->vma | |
1501 | + input_section->output_offset); | |
1502 | ||
1503 | if (skip) | |
1504 | { | |
1505 | memset (&outrel, 0, sizeof outrel); | |
1506 | relocate = false; | |
1507 | } | |
fd8ab9e5 AJ |
1508 | /* h->dynindx may be -1 if this symbol was marked to |
1509 | become local. */ | |
1510 | else if (h != NULL | |
1511 | && ((! info->symbolic && h->dynindx != -1) | |
1512 | || (h->elf_link_hash_flags | |
1513 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
70256ad8 | 1514 | { |
fd8ab9e5 | 1515 | BFD_ASSERT (h->dynindx != -1); |
70256ad8 AJ |
1516 | relocate = false; |
1517 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); | |
5608e05b | 1518 | outrel.r_addend = relocation + rela->r_addend; |
70256ad8 AJ |
1519 | } |
1520 | else | |
1521 | { | |
fd8ab9e5 | 1522 | if (r_type == R_X86_64_64) |
70256ad8 AJ |
1523 | { |
1524 | relocate = true; | |
1525 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); | |
5608e05b | 1526 | outrel.r_addend = relocation + rela->r_addend; |
70256ad8 AJ |
1527 | } |
1528 | else | |
1529 | { | |
dc810e39 | 1530 | long sindx; |
fd8ab9e5 AJ |
1531 | |
1532 | if (h == NULL) | |
1533 | sec = local_sections[r_symndx]; | |
1534 | else | |
1535 | { | |
1536 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
1537 | || (h->root.type | |
1538 | == bfd_link_hash_defweak)); | |
1539 | sec = h->root.u.def.section; | |
1540 | } | |
1541 | if (sec != NULL && bfd_is_abs_section (sec)) | |
dc810e39 | 1542 | sindx = 0; |
fd8ab9e5 AJ |
1543 | else if (sec == NULL || sec->owner == NULL) |
1544 | { | |
1545 | bfd_set_error (bfd_error_bad_value); | |
1546 | return false; | |
1547 | } | |
1548 | else | |
1549 | { | |
1550 | asection *osec; | |
1551 | ||
1552 | osec = sec->output_section; | |
dc810e39 AM |
1553 | sindx = elf_section_data (osec)->dynindx; |
1554 | BFD_ASSERT (sindx > 0); | |
fd8ab9e5 AJ |
1555 | } |
1556 | ||
f631948d | 1557 | relocate = false; |
dc810e39 | 1558 | outrel.r_info = ELF64_R_INFO (sindx, r_type); |
f631948d AJ |
1559 | outrel.r_addend = relocation + rela->r_addend; |
1560 | } | |
fd8ab9e5 | 1561 | |
70256ad8 AJ |
1562 | } |
1563 | ||
1564 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, | |
1565 | (((Elf64_External_Rela *) | |
1566 | sreloc->contents) | |
1567 | + sreloc->reloc_count)); | |
1568 | ++sreloc->reloc_count; | |
1569 | ||
1570 | /* If this reloc is against an external symbol, we do | |
1571 | not want to fiddle with the addend. Otherwise, we | |
1572 | need to include the symbol value so that it becomes | |
1573 | an addend for the dynamic reloc. */ | |
1574 | if (! relocate) | |
1575 | continue; | |
1576 | } | |
1577 | ||
1578 | break; | |
1579 | ||
1580 | default: | |
1581 | break; | |
1582 | } | |
8d88c4ca NC |
1583 | |
1584 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
70256ad8 AJ |
1585 | contents, rela->r_offset, |
1586 | relocation, rela->r_addend); | |
8d88c4ca NC |
1587 | |
1588 | if (r != bfd_reloc_ok) | |
8da6118f KH |
1589 | { |
1590 | switch (r) | |
1591 | { | |
1592 | default: | |
1593 | case bfd_reloc_outofrange: | |
1594 | abort (); | |
1595 | case bfd_reloc_overflow: | |
1596 | { | |
1597 | const char *name; | |
1598 | ||
1599 | if (h != NULL) | |
1600 | name = h->root.root.string; | |
1601 | else | |
1602 | { | |
1603 | name = bfd_elf_string_from_elf_section (input_bfd, | |
1604 | symtab_hdr->sh_link, | |
1605 | sym->st_name); | |
1606 | if (name == NULL) | |
1607 | return false; | |
1608 | if (*name == '\0') | |
1609 | name = bfd_section_name (input_bfd, sec); | |
1610 | } | |
1611 | if (! ((*info->callbacks->reloc_overflow) | |
1612 | (info, name, howto->name, (bfd_vma) 0, | |
70256ad8 | 1613 | input_bfd, input_section, rela->r_offset))) |
8da6118f KH |
1614 | return false; |
1615 | } | |
1616 | break; | |
1617 | } | |
1618 | } | |
8d88c4ca | 1619 | } |
70256ad8 AJ |
1620 | |
1621 | return true; | |
1622 | } | |
1623 | ||
1624 | /* Finish up dynamic symbol handling. We set the contents of various | |
1625 | dynamic sections here. */ | |
1626 | ||
1627 | static boolean | |
1628 | elf64_x86_64_finish_dynamic_symbol (output_bfd, info, h, sym) | |
1629 | bfd *output_bfd; | |
1630 | struct bfd_link_info *info; | |
1631 | struct elf_link_hash_entry *h; | |
1632 | Elf_Internal_Sym *sym; | |
1633 | { | |
1634 | bfd *dynobj; | |
1635 | ||
1636 | dynobj = elf_hash_table (info)->dynobj; | |
1637 | ||
1638 | if (h->plt.offset != (bfd_vma) -1) | |
1639 | { | |
1640 | asection *splt; | |
1641 | asection *sgot; | |
1642 | asection *srela; | |
1643 | bfd_vma plt_index; | |
1644 | bfd_vma got_offset; | |
1645 | Elf_Internal_Rela rela; | |
1646 | ||
1647 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 1648 | it up. */ |
70256ad8 AJ |
1649 | |
1650 | BFD_ASSERT (h->dynindx != -1); | |
1651 | ||
1652 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1653 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
1654 | srela = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
1655 | BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); | |
1656 | ||
1657 | /* Get the index in the procedure linkage table which | |
1658 | corresponds to this symbol. This is the index of this symbol | |
1659 | in all the symbols for which we are making plt entries. The | |
1660 | first entry in the procedure linkage table is reserved. */ | |
1661 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
1662 | ||
1663 | /* Get the offset into the .got table of the entry that | |
407443a3 | 1664 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
fe4770f4 | 1665 | bytes. The first three are reserved for the dynamic linker. */ |
70256ad8 AJ |
1666 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; |
1667 | ||
1668 | /* Fill in the entry in the procedure linkage table. */ | |
1669 | memcpy (splt->contents + h->plt.offset, elf64_x86_64_plt_entry, | |
1670 | PLT_ENTRY_SIZE); | |
1671 | ||
1672 | /* Insert the relocation positions of the plt section. The magic | |
1673 | numbers at the end of the statements are the positions of the | |
1674 | relocations in the plt section. */ | |
653165cc AJ |
1675 | /* Put offset for jmp *name@GOTPCREL(%rip), since the |
1676 | instruction uses 6 bytes, subtract this value. */ | |
1677 | bfd_put_32 (output_bfd, | |
1678 | (sgot->output_section->vma | |
1679 | + sgot->output_offset | |
1680 | + got_offset | |
1681 | - splt->output_section->vma | |
1682 | - splt->output_offset | |
1683 | - h->plt.offset | |
1684 | - 6), | |
1685 | splt->contents + h->plt.offset + 2); | |
1686 | /* Put relocation index. */ | |
1687 | bfd_put_32 (output_bfd, plt_index, | |
70256ad8 | 1688 | splt->contents + h->plt.offset + 7); |
653165cc AJ |
1689 | /* Put offset for jmp .PLT0. */ |
1690 | bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE), | |
70256ad8 AJ |
1691 | splt->contents + h->plt.offset + 12); |
1692 | ||
653165cc AJ |
1693 | /* Fill in the entry in the global offset table, initially this |
1694 | points to the pushq instruction in the PLT which is at offset 6. */ | |
70256ad8 AJ |
1695 | bfd_put_64 (output_bfd, (splt->output_section->vma + splt->output_offset |
1696 | + h->plt.offset + 6), | |
1697 | sgot->contents + got_offset); | |
1698 | ||
1699 | /* Fill in the entry in the .rela.plt section. */ | |
1700 | rela.r_offset = (sgot->output_section->vma | |
1701 | + sgot->output_offset | |
1702 | + got_offset); | |
1703 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_JUMP_SLOT); | |
1704 | rela.r_addend = 0; | |
1705 | bfd_elf64_swap_reloca_out (output_bfd, &rela, | |
1706 | ((Elf64_External_Rela *) srela->contents | |
1707 | + plt_index)); | |
1708 | ||
1709 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1710 | { | |
1711 | /* Mark the symbol as undefined, rather than as defined in | |
407443a3 | 1712 | the .plt section. Leave the value alone. */ |
70256ad8 | 1713 | sym->st_shndx = SHN_UNDEF; |
05aa1441 AJ |
1714 | /* If the symbol is weak, we do need to clear the value. |
1715 | Otherwise, the PLT entry would provide a definition for | |
1716 | the symbol even if the symbol wasn't defined anywhere, | |
1717 | and so the symbol would never be NULL. */ | |
1718 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK) | |
1719 | == 0) | |
1720 | sym->st_value = 0; | |
70256ad8 AJ |
1721 | } |
1722 | } | |
1723 | ||
053579d7 AJ |
1724 | if (h->got.offset != (bfd_vma) -1) |
1725 | { | |
1726 | asection *sgot; | |
1727 | asection *srela; | |
1728 | Elf_Internal_Rela rela; | |
1729 | ||
1730 | /* This symbol has an entry in the global offset table. Set it | |
1731 | up. */ | |
1732 | ||
1733 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1734 | srela = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1735 | BFD_ASSERT (sgot != NULL && srela != NULL); | |
1736 | ||
1737 | rela.r_offset = (sgot->output_section->vma | |
1738 | + sgot->output_offset | |
dc810e39 | 1739 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
1740 | |
1741 | /* If this is a static link, or it is a -Bsymbolic link and the | |
1742 | symbol is defined locally or was forced to be local because | |
1743 | of a version file, we just want to emit a RELATIVE reloc. | |
1744 | The entry in the global offset table will already have been | |
1745 | initialized in the relocate_section function. */ | |
1746 | if (! elf_hash_table (info)->dynamic_sections_created | |
1747 | || (info->shared | |
1748 | && (info->symbolic || h->dynindx == -1) | |
1749 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) | |
1750 | { | |
cc78d0af | 1751 | BFD_ASSERT((h->got.offset & 1) != 0); |
053579d7 AJ |
1752 | rela.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); |
1753 | rela.r_addend = (h->root.u.def.value | |
1754 | + h->root.u.def.section->output_section->vma | |
1755 | + h->root.u.def.section->output_offset); | |
1756 | } | |
1757 | else | |
1758 | { | |
1759 | BFD_ASSERT((h->got.offset & 1) == 0); | |
1760 | bfd_put_64 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); | |
1761 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_GLOB_DAT); | |
1762 | rela.r_addend = 0; | |
1763 | } | |
1764 | ||
1765 | bfd_elf64_swap_reloca_out (output_bfd, &rela, | |
1766 | ((Elf64_External_Rela *) srela->contents | |
1767 | + srela->reloc_count)); | |
1768 | ++srela->reloc_count; | |
1769 | } | |
1770 | ||
70256ad8 AJ |
1771 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) |
1772 | { | |
1773 | asection *s; | |
1774 | Elf_Internal_Rela rela; | |
1775 | ||
1776 | /* This symbol needs a copy reloc. Set it up. */ | |
1777 | ||
1778 | BFD_ASSERT (h->dynindx != -1 | |
1779 | && (h->root.type == bfd_link_hash_defined | |
1780 | || h->root.type == bfd_link_hash_defweak)); | |
1781 | ||
1782 | s = bfd_get_section_by_name (h->root.u.def.section->owner, | |
1783 | ".rela.bss"); | |
1784 | BFD_ASSERT (s != NULL); | |
1785 | ||
1786 | rela.r_offset = (h->root.u.def.value | |
1787 | + h->root.u.def.section->output_section->vma | |
1788 | + h->root.u.def.section->output_offset); | |
1789 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_COPY); | |
1790 | rela.r_addend = 0; | |
1791 | bfd_elf64_swap_reloca_out (output_bfd, &rela, | |
1792 | ((Elf64_External_Rela *) s->contents | |
1793 | + s->reloc_count)); | |
1794 | ++s->reloc_count; | |
1795 | } | |
1796 | ||
1797 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
1798 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
1799 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
1800 | sym->st_shndx = SHN_ABS; | |
1801 | ||
1802 | return true; | |
1803 | } | |
1804 | ||
1805 | /* Finish up the dynamic sections. */ | |
1806 | ||
1807 | static boolean | |
1808 | elf64_x86_64_finish_dynamic_sections (output_bfd, info) | |
1809 | bfd *output_bfd; | |
1810 | struct bfd_link_info *info; | |
1811 | { | |
1812 | bfd *dynobj; | |
1813 | asection *sdyn; | |
1814 | asection *sgot; | |
1815 | ||
1816 | dynobj = elf_hash_table (info)->dynobj; | |
1817 | ||
653165cc AJ |
1818 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); |
1819 | BFD_ASSERT (sgot != NULL); | |
70256ad8 AJ |
1820 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
1821 | ||
1822 | if (elf_hash_table (info)->dynamic_sections_created) | |
1823 | { | |
1824 | asection *splt; | |
1825 | Elf64_External_Dyn *dyncon, *dynconend; | |
1826 | ||
407443a3 | 1827 | BFD_ASSERT (sdyn != NULL); |
70256ad8 AJ |
1828 | |
1829 | dyncon = (Elf64_External_Dyn *) sdyn->contents; | |
1830 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
1831 | for (; dyncon < dynconend; dyncon++) | |
1832 | { | |
1833 | Elf_Internal_Dyn dyn; | |
1834 | const char *name; | |
1835 | asection *s; | |
1836 | ||
1837 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); | |
1838 | ||
1839 | switch (dyn.d_tag) | |
1840 | { | |
1841 | default: | |
053579d7 | 1842 | continue; |
70256ad8 AJ |
1843 | |
1844 | case DT_PLTGOT: | |
1845 | name = ".got"; | |
1846 | goto get_vma; | |
1847 | ||
1848 | case DT_JMPREL: | |
1849 | name = ".rela.plt"; | |
1850 | ||
1851 | get_vma: | |
1852 | s = bfd_get_section_by_name (output_bfd, name); | |
1853 | BFD_ASSERT (s != NULL); | |
1854 | dyn.d_un.d_ptr = s->vma; | |
1855 | break; | |
1856 | ||
1857 | case DT_RELASZ: | |
1858 | /* FIXME: This comment and code is from elf64-alpha.c: */ | |
1859 | /* My interpretation of the TIS v1.1 ELF document indicates | |
407443a3 | 1860 | that RELASZ should not include JMPREL. This is not what |
70256ad8 AJ |
1861 | the rest of the BFD does. It is, however, what the |
1862 | glibc ld.so wants. Do this fixup here until we found | |
1863 | out who is right. */ | |
1864 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); | |
1865 | if (s) | |
1866 | { | |
407443a3 | 1867 | /* Subtract JMPREL size from RELASZ. */ |
70256ad8 AJ |
1868 | dyn.d_un.d_val -= |
1869 | (s->_cooked_size ? s->_cooked_size : s->_raw_size); | |
1870 | } | |
1871 | break; | |
1872 | ||
1873 | case DT_PLTRELSZ: | |
1874 | s = bfd_get_section_by_name (output_bfd, ".rela.plt"); | |
1875 | BFD_ASSERT (s != NULL); | |
1876 | dyn.d_un.d_val = | |
1877 | (s->_cooked_size != 0 ? s->_cooked_size : s->_raw_size); | |
1878 | break; | |
1879 | } | |
70256ad8 AJ |
1880 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
1881 | } | |
1882 | ||
1883 | /* Initialize the contents of the .plt section. */ | |
407443a3 AJ |
1884 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
1885 | BFD_ASSERT (splt != NULL); | |
70256ad8 AJ |
1886 | if (splt->_raw_size > 0) |
1887 | { | |
653165cc | 1888 | /* Fill in the first entry in the procedure linkage table. */ |
407443a3 | 1889 | memcpy (splt->contents, elf64_x86_64_plt0_entry, PLT_ENTRY_SIZE); |
653165cc AJ |
1890 | /* Add offset for pushq GOT+8(%rip), since the instruction |
1891 | uses 6 bytes subtract this value. */ | |
1892 | bfd_put_32 (output_bfd, | |
1893 | (sgot->output_section->vma | |
1894 | + sgot->output_offset | |
1895 | + 8 | |
1896 | - splt->output_section->vma | |
1897 | - splt->output_offset | |
1898 | - 6), | |
1899 | splt->contents + 2); | |
1900 | /* Add offset for jmp *GOT+16(%rip). The 12 is the offset to | |
1901 | the end of the instruction. */ | |
1902 | bfd_put_32 (output_bfd, | |
1903 | (sgot->output_section->vma | |
1904 | + sgot->output_offset | |
1905 | + 16 | |
1906 | - splt->output_section->vma | |
1907 | - splt->output_offset | |
1908 | - 12), | |
1909 | splt->contents + 8); | |
1910 | ||
70256ad8 AJ |
1911 | } |
1912 | ||
1913 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = | |
1914 | PLT_ENTRY_SIZE; | |
1915 | } | |
1916 | ||
1917 | /* Set the first entry in the global offset table to the address of | |
1918 | the dynamic section. */ | |
70256ad8 AJ |
1919 | if (sgot->_raw_size > 0) |
1920 | { | |
1921 | if (sdyn == NULL) | |
1922 | bfd_put_64 (output_bfd, (bfd_vma) 0, sgot->contents); | |
1923 | else | |
1924 | bfd_put_64 (output_bfd, | |
1925 | sdyn->output_section->vma + sdyn->output_offset, | |
1926 | sgot->contents); | |
653165cc | 1927 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ |
70256ad8 AJ |
1928 | bfd_put_64 (output_bfd, (bfd_vma) 0, sgot->contents + GOT_ENTRY_SIZE); |
1929 | bfd_put_64 (output_bfd, (bfd_vma) 0, sgot->contents + GOT_ENTRY_SIZE*2); | |
1930 | } | |
1931 | ||
1932 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = | |
1933 | GOT_ENTRY_SIZE; | |
1934 | ||
8d88c4ca NC |
1935 | return true; |
1936 | } | |
1937 | ||
8df9fc9d AJ |
1938 | static enum elf_reloc_type_class |
1939 | elf64_x86_64_reloc_type_class (type) | |
1940 | int type; | |
1941 | { | |
1942 | switch (type) | |
1943 | { | |
1944 | case R_X86_64_RELATIVE: | |
1945 | return reloc_class_relative; | |
1946 | case R_X86_64_JUMP_SLOT: | |
1947 | return reloc_class_plt; | |
1948 | case R_X86_64_COPY: | |
1949 | return reloc_class_copy; | |
1950 | default: | |
1951 | return reloc_class_normal; | |
1952 | } | |
1953 | } | |
1954 | ||
70256ad8 AJ |
1955 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec |
1956 | #define TARGET_LITTLE_NAME "elf64-x86-64" | |
1957 | #define ELF_ARCH bfd_arch_i386 | |
1958 | #define ELF_MACHINE_CODE EM_X86_64 | |
1959 | #define ELF_MAXPAGESIZE 0x100000 | |
1960 | ||
1961 | #define elf_backend_can_gc_sections 1 | |
1962 | #define elf_backend_want_got_plt 1 | |
1963 | #define elf_backend_plt_readonly 1 | |
1964 | #define elf_backend_want_plt_sym 0 | |
1965 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
1966 | #define elf_backend_plt_header_size PLT_ENTRY_SIZE | |
1967 | ||
1968 | #define elf_info_to_howto elf64_x86_64_info_to_howto | |
70256ad8 AJ |
1969 | |
1970 | #define bfd_elf64_bfd_final_link _bfd_elf64_gc_common_final_link | |
1971 | #define bfd_elf64_bfd_link_hash_table_create \ | |
1972 | elf64_x86_64_link_hash_table_create | |
407443a3 | 1973 | #define bfd_elf64_bfd_reloc_type_lookup elf64_x86_64_reloc_type_lookup |
70256ad8 AJ |
1974 | |
1975 | #define elf_backend_adjust_dynamic_symbol elf64_x86_64_adjust_dynamic_symbol | |
1976 | #define elf_backend_check_relocs elf64_x86_64_check_relocs | |
1977 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections | |
1978 | #define elf_backend_finish_dynamic_sections \ | |
1979 | elf64_x86_64_finish_dynamic_sections | |
1980 | #define elf_backend_finish_dynamic_symbol elf64_x86_64_finish_dynamic_symbol | |
1981 | #define elf_backend_gc_mark_hook elf64_x86_64_gc_mark_hook | |
1982 | #define elf_backend_gc_sweep_hook elf64_x86_64_gc_sweep_hook | |
1983 | #define elf_backend_relocate_section elf64_x86_64_relocate_section | |
1984 | #define elf_backend_size_dynamic_sections elf64_x86_64_size_dynamic_sections | |
407443a3 | 1985 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
8df9fc9d | 1986 | #define elf_backend_reloc_type_class elf64_x86_64_reloc_type_class |
8d88c4ca NC |
1987 | |
1988 | #include "elf64-target.h" |