Commit | Line | Data |
---|---|---|
351f65ca | 1 | /* X86-64 specific support for ELF |
4dfe6ac6 | 2 | Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, |
9f973f28 L |
3 | 2010, 2011 |
4 | Free Software Foundation, Inc. | |
8d88c4ca NC |
5 | Contributed by Jan Hubicka <jh@suse.cz>. |
6 | ||
ae9a127f | 7 | This file is part of BFD, the Binary File Descriptor library. |
8d88c4ca | 8 | |
ae9a127f NC |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 11 | the Free Software Foundation; either version 3 of the License, or |
ae9a127f | 12 | (at your option) any later version. |
8d88c4ca | 13 | |
ae9a127f NC |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
8d88c4ca | 18 | |
ae9a127f NC |
19 | You should have received a copy of the GNU General Public License |
20 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
21 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
22 | MA 02110-1301, USA. */ | |
8d88c4ca | 23 | |
8d88c4ca | 24 | #include "sysdep.h" |
3db64b00 | 25 | #include "bfd.h" |
c434dee6 | 26 | #include "bfdlink.h" |
8d88c4ca NC |
27 | #include "libbfd.h" |
28 | #include "elf-bfd.h" | |
142411ca | 29 | #include "bfd_stdint.h" |
c25bc9fc L |
30 | #include "objalloc.h" |
31 | #include "hashtab.h" | |
8d88c4ca NC |
32 | |
33 | #include "elf/x86-64.h" | |
34 | ||
8d88c4ca NC |
35 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
36 | #define MINUS_ONE (~ (bfd_vma) 0) | |
37 | ||
351f65ca L |
38 | /* Since both 32-bit and 64-bit x86-64 encode relocation type in the |
39 | identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get | |
40 | relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE | |
41 | since they are the same. */ | |
42 | ||
43 | #define ABI_64_P(abfd) \ | |
44 | (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64) | |
45 | ||
8d88c4ca | 46 | /* The relocation "howto" table. Order of fields: |
7b81dfbb AJ |
47 | type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow, |
48 | special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */ | |
70256ad8 AJ |
49 | static reloc_howto_type x86_64_elf_howto_table[] = |
50 | { | |
b34976b6 AM |
51 | HOWTO(R_X86_64_NONE, 0, 0, 0, FALSE, 0, complain_overflow_dont, |
52 | bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000, | |
53 | FALSE), | |
54 | HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
55 | bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE, | |
56 | FALSE), | |
57 | HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
58 | bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff, | |
59 | TRUE), | |
60 | HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
61 | bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff, | |
62 | FALSE), | |
63 | HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
64 | bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff, | |
65 | TRUE), | |
66 | HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
67 | bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff, | |
68 | FALSE), | |
69 | HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
70 | bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE, | |
71 | MINUS_ONE, FALSE), | |
72 | HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
73 | bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE, | |
74 | MINUS_ONE, FALSE), | |
75 | HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
76 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE, | |
77 | MINUS_ONE, FALSE), | |
78 | HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
79 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff, | |
80 | 0xffffffff, TRUE), | |
81 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, | |
82 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
83 | FALSE), | |
84 | HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
85 | bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff, | |
86 | FALSE), | |
87 | HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
88 | bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE), | |
b0360d8c | 89 | HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
b34976b6 | 90 | bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE), |
ac2aa337 | 91 | HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, |
b34976b6 AM |
92 | bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE), |
93 | HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
94 | bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE), | |
95 | HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
96 | bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE, | |
97 | MINUS_ONE, FALSE), | |
98 | HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
99 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE, | |
100 | MINUS_ONE, FALSE), | |
101 | HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
102 | bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE, | |
103 | MINUS_ONE, FALSE), | |
104 | HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
105 | bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff, | |
106 | 0xffffffff, TRUE), | |
107 | HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
108 | bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff, | |
109 | 0xffffffff, TRUE), | |
ac2aa337 | 110 | HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, |
b34976b6 AM |
111 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff, |
112 | 0xffffffff, FALSE), | |
113 | HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
114 | bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff, | |
115 | 0xffffffff, TRUE), | |
116 | HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
117 | bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff, | |
118 | 0xffffffff, FALSE), | |
d6ab8113 JB |
119 | HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, |
120 | bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE, | |
121 | TRUE), | |
122 | HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
123 | bfd_elf_generic_reloc, "R_X86_64_GOTOFF64", | |
124 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
125 | HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
126 | bfd_elf_generic_reloc, "R_X86_64_GOTPC32", | |
127 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
7b81dfbb AJ |
128 | HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, |
129 | bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE, | |
130 | FALSE), | |
131 | HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
132 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE, | |
133 | MINUS_ONE, TRUE), | |
134 | HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
135 | bfd_elf_generic_reloc, "R_X86_64_GOTPC64", | |
136 | FALSE, MINUS_ONE, MINUS_ONE, TRUE), | |
137 | HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
138 | bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE, | |
139 | MINUS_ONE, FALSE), | |
140 | HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
141 | bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE, | |
142 | MINUS_ONE, FALSE), | |
67a4f2b7 AO |
143 | EMPTY_HOWTO (32), |
144 | EMPTY_HOWTO (33), | |
145 | HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0, | |
146 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
147 | "R_X86_64_GOTPC32_TLSDESC", | |
148 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
149 | HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0, | |
150 | complain_overflow_dont, bfd_elf_generic_reloc, | |
151 | "R_X86_64_TLSDESC_CALL", | |
152 | FALSE, 0, 0, FALSE), | |
153 | HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0, | |
154 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
155 | "R_X86_64_TLSDESC", | |
156 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
cbe950e9 L |
157 | HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
158 | bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE, | |
159 | MINUS_ONE, FALSE), | |
fe4770f4 | 160 | |
a33d77bc JB |
161 | /* We have a gap in the reloc numbers here. |
162 | R_X86_64_standard counts the number up to this point, and | |
163 | R_X86_64_vt_offset is the value to subtract from a reloc type of | |
164 | R_X86_64_GNU_VT* to form an index into this table. */ | |
cbe950e9 | 165 | #define R_X86_64_standard (R_X86_64_IRELATIVE + 1) |
a33d77bc JB |
166 | #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard) |
167 | ||
fe4770f4 | 168 | /* GNU extension to record C++ vtable hierarchy. */ |
b34976b6 AM |
169 | HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
170 | NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE), | |
fe4770f4 AJ |
171 | |
172 | /* GNU extension to record C++ vtable member usage. */ | |
b34976b6 AM |
173 | HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
174 | _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0, | |
175 | FALSE) | |
8d88c4ca NC |
176 | }; |
177 | ||
d8045f23 NC |
178 | #define IS_X86_64_PCREL_TYPE(TYPE) \ |
179 | ( ((TYPE) == R_X86_64_PC8) \ | |
180 | || ((TYPE) == R_X86_64_PC16) \ | |
181 | || ((TYPE) == R_X86_64_PC32) \ | |
182 | || ((TYPE) == R_X86_64_PC64)) | |
183 | ||
8d88c4ca | 184 | /* Map BFD relocs to the x86_64 elf relocs. */ |
70256ad8 AJ |
185 | struct elf_reloc_map |
186 | { | |
8d88c4ca NC |
187 | bfd_reloc_code_real_type bfd_reloc_val; |
188 | unsigned char elf_reloc_val; | |
189 | }; | |
190 | ||
dc810e39 | 191 | static const struct elf_reloc_map x86_64_reloc_map[] = |
8d88c4ca | 192 | { |
70256ad8 AJ |
193 | { BFD_RELOC_NONE, R_X86_64_NONE, }, |
194 | { BFD_RELOC_64, R_X86_64_64, }, | |
195 | { BFD_RELOC_32_PCREL, R_X86_64_PC32, }, | |
196 | { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,}, | |
197 | { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,}, | |
198 | { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, }, | |
199 | { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, }, | |
200 | { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, }, | |
201 | { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, }, | |
202 | { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, }, | |
203 | { BFD_RELOC_32, R_X86_64_32, }, | |
204 | { BFD_RELOC_X86_64_32S, R_X86_64_32S, }, | |
205 | { BFD_RELOC_16, R_X86_64_16, }, | |
206 | { BFD_RELOC_16_PCREL, R_X86_64_PC16, }, | |
207 | { BFD_RELOC_8, R_X86_64_8, }, | |
208 | { BFD_RELOC_8_PCREL, R_X86_64_PC8, }, | |
bffbf940 JJ |
209 | { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, }, |
210 | { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, }, | |
211 | { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, }, | |
212 | { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, }, | |
213 | { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, }, | |
214 | { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, }, | |
215 | { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, }, | |
216 | { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, }, | |
d6ab8113 JB |
217 | { BFD_RELOC_64_PCREL, R_X86_64_PC64, }, |
218 | { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, }, | |
219 | { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, }, | |
7b81dfbb AJ |
220 | { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, }, |
221 | { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, }, | |
222 | { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, }, | |
223 | { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, }, | |
224 | { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, }, | |
67a4f2b7 AO |
225 | { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, }, |
226 | { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, }, | |
227 | { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, }, | |
cbe950e9 | 228 | { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, }, |
fe4770f4 AJ |
229 | { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, }, |
230 | { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, }, | |
8d88c4ca NC |
231 | }; |
232 | ||
67a4f2b7 | 233 | static reloc_howto_type * |
351f65ca | 234 | elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type) |
67a4f2b7 AO |
235 | { |
236 | unsigned i; | |
237 | ||
238 | if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT | |
239 | || r_type >= (unsigned int) R_X86_64_max) | |
240 | { | |
241 | if (r_type >= (unsigned int) R_X86_64_standard) | |
242 | { | |
243 | (*_bfd_error_handler) (_("%B: invalid relocation type %d"), | |
244 | abfd, (int) r_type); | |
245 | r_type = R_X86_64_NONE; | |
246 | } | |
247 | i = r_type; | |
248 | } | |
249 | else | |
250 | i = r_type - (unsigned int) R_X86_64_vt_offset; | |
251 | BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type); | |
252 | return &x86_64_elf_howto_table[i]; | |
253 | } | |
8d88c4ca NC |
254 | |
255 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
256 | static reloc_howto_type * | |
351f65ca L |
257 | elf_x86_64_reloc_type_lookup (bfd *abfd, |
258 | bfd_reloc_code_real_type code) | |
8d88c4ca NC |
259 | { |
260 | unsigned int i; | |
27482721 | 261 | |
8d88c4ca NC |
262 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); |
263 | i++) | |
264 | { | |
265 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
351f65ca L |
266 | return elf_x86_64_rtype_to_howto (abfd, |
267 | x86_64_reloc_map[i].elf_reloc_val); | |
8d88c4ca NC |
268 | } |
269 | return 0; | |
270 | } | |
271 | ||
157090f7 | 272 | static reloc_howto_type * |
351f65ca L |
273 | elf_x86_64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
274 | const char *r_name) | |
157090f7 AM |
275 | { |
276 | unsigned int i; | |
277 | ||
278 | for (i = 0; | |
279 | i < (sizeof (x86_64_elf_howto_table) | |
280 | / sizeof (x86_64_elf_howto_table[0])); | |
281 | i++) | |
282 | if (x86_64_elf_howto_table[i].name != NULL | |
283 | && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0) | |
284 | return &x86_64_elf_howto_table[i]; | |
285 | ||
286 | return NULL; | |
287 | } | |
288 | ||
8d88c4ca | 289 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
8da6118f | 290 | |
8d88c4ca | 291 | static void |
351f65ca L |
292 | elf_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, |
293 | Elf_Internal_Rela *dst) | |
8d88c4ca | 294 | { |
67a4f2b7 | 295 | unsigned r_type; |
8d88c4ca | 296 | |
351f65ca L |
297 | r_type = ELF32_R_TYPE (dst->r_info); |
298 | cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type); | |
8d88c4ca NC |
299 | BFD_ASSERT (r_type == cache_ptr->howto->type); |
300 | } | |
70256ad8 | 301 | \f |
3bab7989 | 302 | /* Support for core dump NOTE sections. */ |
b34976b6 | 303 | static bfd_boolean |
351f65ca | 304 | elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
305 | { |
306 | int offset; | |
eea6121a | 307 | size_t size; |
3bab7989 ML |
308 | |
309 | switch (note->descsz) | |
310 | { | |
311 | default: | |
b34976b6 | 312 | return FALSE; |
3bab7989 ML |
313 | |
314 | case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */ | |
315 | /* pr_cursig */ | |
cedb70c5 | 316 | elf_tdata (abfd)->core_signal |
3bab7989 ML |
317 | = bfd_get_16 (abfd, note->descdata + 12); |
318 | ||
319 | /* pr_pid */ | |
261b8d08 | 320 | elf_tdata (abfd)->core_lwpid |
3bab7989 ML |
321 | = bfd_get_32 (abfd, note->descdata + 32); |
322 | ||
323 | /* pr_reg */ | |
324 | offset = 112; | |
eea6121a | 325 | size = 216; |
3bab7989 ML |
326 | |
327 | break; | |
328 | } | |
329 | ||
330 | /* Make a ".reg/999" section. */ | |
331 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 332 | size, note->descpos + offset); |
3bab7989 ML |
333 | } |
334 | ||
b34976b6 | 335 | static bfd_boolean |
351f65ca | 336 | elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
337 | { |
338 | switch (note->descsz) | |
339 | { | |
340 | default: | |
b34976b6 | 341 | return FALSE; |
3bab7989 ML |
342 | |
343 | case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */ | |
261b8d08 PA |
344 | elf_tdata (abfd)->core_pid |
345 | = bfd_get_32 (abfd, note->descdata + 24); | |
3bab7989 ML |
346 | elf_tdata (abfd)->core_program |
347 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); | |
348 | elf_tdata (abfd)->core_command | |
349 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); | |
350 | } | |
351 | ||
352 | /* Note that for some reason, a spurious space is tacked | |
353 | onto the end of the args in some (at least one anyway) | |
354 | implementations, so strip it off if it exists. */ | |
355 | ||
356 | { | |
357 | char *command = elf_tdata (abfd)->core_command; | |
358 | int n = strlen (command); | |
359 | ||
360 | if (0 < n && command[n - 1] == ' ') | |
361 | command[n - 1] = '\0'; | |
362 | } | |
363 | ||
b34976b6 | 364 | return TRUE; |
3bab7989 ML |
365 | } |
366 | \f | |
407443a3 | 367 | /* Functions for the x86-64 ELF linker. */ |
70256ad8 | 368 | |
407443a3 | 369 | /* The name of the dynamic interpreter. This is put in the .interp |
70256ad8 AJ |
370 | section. */ |
371 | ||
351f65ca L |
372 | #define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1" |
373 | #define ELF32_DYNAMIC_INTERPRETER "/lib/ld32.so.1" | |
70256ad8 | 374 | |
d40d037c AJ |
375 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
376 | copying dynamic variables from a shared lib into an app's dynbss | |
377 | section, and instead use a dynamic relocation to point into the | |
378 | shared lib. */ | |
379 | #define ELIMINATE_COPY_RELOCS 1 | |
380 | ||
70256ad8 AJ |
381 | /* The size in bytes of an entry in the global offset table. */ |
382 | ||
383 | #define GOT_ENTRY_SIZE 8 | |
8d88c4ca | 384 | |
70256ad8 | 385 | /* The size in bytes of an entry in the procedure linkage table. */ |
8d88c4ca | 386 | |
70256ad8 AJ |
387 | #define PLT_ENTRY_SIZE 16 |
388 | ||
389 | /* The first entry in a procedure linkage table looks like this. See the | |
390 | SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */ | |
391 | ||
351f65ca | 392 | static const bfd_byte elf_x86_64_plt0_entry[PLT_ENTRY_SIZE] = |
70256ad8 | 393 | { |
653165cc AJ |
394 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
395 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
10efb593 | 396 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ |
70256ad8 AJ |
397 | }; |
398 | ||
399 | /* Subsequent entries in a procedure linkage table look like this. */ | |
400 | ||
351f65ca | 401 | static const bfd_byte elf_x86_64_plt_entry[PLT_ENTRY_SIZE] = |
70256ad8 | 402 | { |
653165cc | 403 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 404 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 405 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
406 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
407 | 0xe9, /* jmp relative */ | |
408 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
409 | }; | |
410 | ||
70256ad8 AJ |
411 | /* x86-64 ELF linker hash entry. */ |
412 | ||
351f65ca | 413 | struct elf_x86_64_link_hash_entry |
70256ad8 | 414 | { |
c434dee6 | 415 | struct elf_link_hash_entry elf; |
70256ad8 | 416 | |
c434dee6 | 417 | /* Track dynamic relocs copied for this symbol. */ |
e03a8ed8 | 418 | struct elf_dyn_relocs *dyn_relocs; |
bffbf940 JJ |
419 | |
420 | #define GOT_UNKNOWN 0 | |
421 | #define GOT_NORMAL 1 | |
422 | #define GOT_TLS_GD 2 | |
423 | #define GOT_TLS_IE 3 | |
67a4f2b7 AO |
424 | #define GOT_TLS_GDESC 4 |
425 | #define GOT_TLS_GD_BOTH_P(type) \ | |
426 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
427 | #define GOT_TLS_GD_P(type) \ | |
428 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
429 | #define GOT_TLS_GDESC_P(type) \ | |
430 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
431 | #define GOT_TLS_GD_ANY_P(type) \ | |
432 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
bffbf940 | 433 | unsigned char tls_type; |
67a4f2b7 AO |
434 | |
435 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, | |
436 | starting at the end of the jump table. */ | |
437 | bfd_vma tlsdesc_got; | |
bffbf940 JJ |
438 | }; |
439 | ||
351f65ca L |
440 | #define elf_x86_64_hash_entry(ent) \ |
441 | ((struct elf_x86_64_link_hash_entry *)(ent)) | |
bffbf940 | 442 | |
351f65ca | 443 | struct elf_x86_64_obj_tdata |
bffbf940 JJ |
444 | { |
445 | struct elf_obj_tdata root; | |
446 | ||
447 | /* tls_type for each local got entry. */ | |
448 | char *local_got_tls_type; | |
67a4f2b7 AO |
449 | |
450 | /* GOTPLT entries for TLS descriptors. */ | |
451 | bfd_vma *local_tlsdesc_gotent; | |
70256ad8 AJ |
452 | }; |
453 | ||
351f65ca L |
454 | #define elf_x86_64_tdata(abfd) \ |
455 | ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any) | |
bffbf940 | 456 | |
351f65ca L |
457 | #define elf_x86_64_local_got_tls_type(abfd) \ |
458 | (elf_x86_64_tdata (abfd)->local_got_tls_type) | |
bffbf940 | 459 | |
351f65ca L |
460 | #define elf_x86_64_local_tlsdesc_gotent(abfd) \ |
461 | (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent) | |
bffbf940 | 462 | |
0ffa91dd NC |
463 | #define is_x86_64_elf(bfd) \ |
464 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
465 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 466 | && elf_object_id (bfd) == X86_64_ELF_DATA) |
0ffa91dd NC |
467 | |
468 | static bfd_boolean | |
351f65ca | 469 | elf_x86_64_mkobject (bfd *abfd) |
0ffa91dd | 470 | { |
351f65ca | 471 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata), |
4dfe6ac6 | 472 | X86_64_ELF_DATA); |
0ffa91dd NC |
473 | } |
474 | ||
c434dee6 | 475 | /* x86-64 ELF linker hash table. */ |
8d88c4ca | 476 | |
351f65ca | 477 | struct elf_x86_64_link_hash_table |
407443a3 | 478 | { |
c434dee6 | 479 | struct elf_link_hash_table elf; |
70256ad8 | 480 | |
c434dee6 | 481 | /* Short-cuts to get to dynamic linker sections. */ |
c434dee6 AJ |
482 | asection *sdynbss; |
483 | asection *srelbss; | |
70256ad8 | 484 | |
4dfe6ac6 NC |
485 | union |
486 | { | |
bffbf940 JJ |
487 | bfd_signed_vma refcount; |
488 | bfd_vma offset; | |
489 | } tls_ld_got; | |
490 | ||
67a4f2b7 AO |
491 | /* The amount of space used by the jump slots in the GOT. */ |
492 | bfd_vma sgotplt_jump_table_size; | |
493 | ||
87d72d41 AM |
494 | /* Small local sym cache. */ |
495 | struct sym_cache sym_cache; | |
9f03412a | 496 | |
351f65ca L |
497 | bfd_vma (*r_info) (bfd_vma, bfd_vma); |
498 | bfd_vma (*r_sym) (bfd_vma); | |
248775ba | 499 | unsigned int pointer_r_type; |
351f65ca L |
500 | const char *dynamic_interpreter; |
501 | int dynamic_interpreter_size; | |
502 | ||
9f03412a AO |
503 | /* _TLS_MODULE_BASE_ symbol. */ |
504 | struct bfd_link_hash_entry *tls_module_base; | |
c25bc9fc L |
505 | |
506 | /* Used by local STT_GNU_IFUNC symbols. */ | |
507 | htab_t loc_hash_table; | |
4dfe6ac6 NC |
508 | void * loc_hash_memory; |
509 | ||
510 | /* The offset into splt of the PLT entry for the TLS descriptor | |
511 | resolver. Special values are 0, if not necessary (or not found | |
512 | to be necessary yet), and -1 if needed but not determined | |
513 | yet. */ | |
514 | bfd_vma tlsdesc_plt; | |
515 | /* The offset into sgot of the GOT entry used by the PLT entry | |
516 | above. */ | |
517 | bfd_vma tlsdesc_got; | |
c434dee6 | 518 | }; |
70256ad8 AJ |
519 | |
520 | /* Get the x86-64 ELF linker hash table from a link_info structure. */ | |
8d88c4ca | 521 | |
351f65ca | 522 | #define elf_x86_64_hash_table(p) \ |
4dfe6ac6 | 523 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
351f65ca | 524 | == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL) |
8d88c4ca | 525 | |
351f65ca | 526 | #define elf_x86_64_compute_jump_table_size(htab) \ |
6de2ae4a | 527 | ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE) |
67a4f2b7 | 528 | |
407443a3 | 529 | /* Create an entry in an x86-64 ELF linker hash table. */ |
70256ad8 AJ |
530 | |
531 | static struct bfd_hash_entry * | |
351f65ca L |
532 | elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry, |
533 | struct bfd_hash_table *table, | |
534 | const char *string) | |
70256ad8 | 535 | { |
70256ad8 | 536 | /* Allocate the structure if it has not already been allocated by a |
c434dee6 AJ |
537 | subclass. */ |
538 | if (entry == NULL) | |
539 | { | |
a50b1753 NC |
540 | entry = (struct bfd_hash_entry *) |
541 | bfd_hash_allocate (table, | |
351f65ca | 542 | sizeof (struct elf_x86_64_link_hash_entry)); |
c434dee6 AJ |
543 | if (entry == NULL) |
544 | return entry; | |
545 | } | |
70256ad8 AJ |
546 | |
547 | /* Call the allocation method of the superclass. */ | |
c434dee6 AJ |
548 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
549 | if (entry != NULL) | |
70256ad8 | 550 | { |
351f65ca | 551 | struct elf_x86_64_link_hash_entry *eh; |
c434dee6 | 552 | |
351f65ca | 553 | eh = (struct elf_x86_64_link_hash_entry *) entry; |
c434dee6 | 554 | eh->dyn_relocs = NULL; |
bffbf940 | 555 | eh->tls_type = GOT_UNKNOWN; |
67a4f2b7 | 556 | eh->tlsdesc_got = (bfd_vma) -1; |
70256ad8 AJ |
557 | } |
558 | ||
c434dee6 | 559 | return entry; |
70256ad8 AJ |
560 | } |
561 | ||
c25bc9fc L |
562 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
563 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
564 | as global symbol. We reuse indx and dynstr_index for local symbol | |
565 | hash since they aren't used by global symbols in this backend. */ | |
566 | ||
567 | static hashval_t | |
351f65ca | 568 | elf_x86_64_local_htab_hash (const void *ptr) |
c25bc9fc L |
569 | { |
570 | struct elf_link_hash_entry *h | |
571 | = (struct elf_link_hash_entry *) ptr; | |
d2149d72 | 572 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
c25bc9fc L |
573 | } |
574 | ||
575 | /* Compare local hash entries. */ | |
576 | ||
577 | static int | |
351f65ca | 578 | elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2) |
c25bc9fc L |
579 | { |
580 | struct elf_link_hash_entry *h1 | |
581 | = (struct elf_link_hash_entry *) ptr1; | |
582 | struct elf_link_hash_entry *h2 | |
583 | = (struct elf_link_hash_entry *) ptr2; | |
584 | ||
585 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
586 | } | |
587 | ||
588 | /* Find and/or create a hash entry for local symbol. */ | |
589 | ||
590 | static struct elf_link_hash_entry * | |
351f65ca L |
591 | elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab, |
592 | bfd *abfd, const Elf_Internal_Rela *rel, | |
593 | bfd_boolean create) | |
c25bc9fc | 594 | { |
351f65ca | 595 | struct elf_x86_64_link_hash_entry e, *ret; |
c25bc9fc | 596 | asection *sec = abfd->sections; |
d2149d72 | 597 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, |
351f65ca | 598 | htab->r_sym (rel->r_info)); |
c25bc9fc L |
599 | void **slot; |
600 | ||
601 | e.elf.indx = sec->id; | |
351f65ca | 602 | e.elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc L |
603 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, |
604 | create ? INSERT : NO_INSERT); | |
605 | ||
606 | if (!slot) | |
607 | return NULL; | |
608 | ||
609 | if (*slot) | |
610 | { | |
351f65ca | 611 | ret = (struct elf_x86_64_link_hash_entry *) *slot; |
c25bc9fc L |
612 | return &ret->elf; |
613 | } | |
614 | ||
351f65ca | 615 | ret = (struct elf_x86_64_link_hash_entry *) |
c25bc9fc | 616 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, |
351f65ca | 617 | sizeof (struct elf_x86_64_link_hash_entry)); |
c25bc9fc L |
618 | if (ret) |
619 | { | |
620 | memset (ret, 0, sizeof (*ret)); | |
621 | ret->elf.indx = sec->id; | |
351f65ca | 622 | ret->elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc | 623 | ret->elf.dynindx = -1; |
c25bc9fc L |
624 | *slot = ret; |
625 | } | |
626 | return &ret->elf; | |
627 | } | |
628 | ||
8d88c4ca NC |
629 | /* Create an X86-64 ELF linker hash table. */ |
630 | ||
631 | static struct bfd_link_hash_table * | |
351f65ca | 632 | elf_x86_64_link_hash_table_create (bfd *abfd) |
8d88c4ca | 633 | { |
351f65ca L |
634 | struct elf_x86_64_link_hash_table *ret; |
635 | bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table); | |
8d88c4ca | 636 | |
351f65ca | 637 | ret = (struct elf_x86_64_link_hash_table *) bfd_malloc (amt); |
c434dee6 | 638 | if (ret == NULL) |
8d88c4ca NC |
639 | return NULL; |
640 | ||
eb4ff4d6 | 641 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
351f65ca L |
642 | elf_x86_64_link_hash_newfunc, |
643 | sizeof (struct elf_x86_64_link_hash_entry), | |
4dfe6ac6 | 644 | X86_64_ELF_DATA)) |
8d88c4ca | 645 | { |
e2d34d7d | 646 | free (ret); |
8d88c4ca NC |
647 | return NULL; |
648 | } | |
649 | ||
c434dee6 AJ |
650 | ret->sdynbss = NULL; |
651 | ret->srelbss = NULL; | |
87d72d41 | 652 | ret->sym_cache.abfd = NULL; |
67a4f2b7 AO |
653 | ret->tlsdesc_plt = 0; |
654 | ret->tlsdesc_got = 0; | |
bffbf940 | 655 | ret->tls_ld_got.refcount = 0; |
67a4f2b7 | 656 | ret->sgotplt_jump_table_size = 0; |
9f03412a | 657 | ret->tls_module_base = NULL; |
6bbec505 | 658 | |
351f65ca L |
659 | if (ABI_64_P (abfd)) |
660 | { | |
661 | ret->r_info = elf64_r_info; | |
662 | ret->r_sym = elf64_r_sym; | |
248775ba | 663 | ret->pointer_r_type = R_X86_64_64; |
351f65ca L |
664 | ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER; |
665 | ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER; | |
666 | } | |
667 | else | |
668 | { | |
669 | ret->r_info = elf32_r_info; | |
670 | ret->r_sym = elf32_r_sym; | |
248775ba | 671 | ret->pointer_r_type = R_X86_64_32; |
351f65ca L |
672 | ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER; |
673 | ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER; | |
674 | } | |
675 | ||
c25bc9fc | 676 | ret->loc_hash_table = htab_try_create (1024, |
351f65ca L |
677 | elf_x86_64_local_htab_hash, |
678 | elf_x86_64_local_htab_eq, | |
c25bc9fc L |
679 | NULL); |
680 | ret->loc_hash_memory = objalloc_create (); | |
681 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
682 | { | |
683 | free (ret); | |
684 | return NULL; | |
685 | } | |
686 | ||
c434dee6 AJ |
687 | return &ret->elf.root; |
688 | } | |
689 | ||
c25bc9fc L |
690 | /* Destroy an X86-64 ELF linker hash table. */ |
691 | ||
692 | static void | |
351f65ca | 693 | elf_x86_64_link_hash_table_free (struct bfd_link_hash_table *hash) |
c25bc9fc | 694 | { |
351f65ca L |
695 | struct elf_x86_64_link_hash_table *htab |
696 | = (struct elf_x86_64_link_hash_table *) hash; | |
c25bc9fc L |
697 | |
698 | if (htab->loc_hash_table) | |
699 | htab_delete (htab->loc_hash_table); | |
700 | if (htab->loc_hash_memory) | |
701 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
702 | _bfd_generic_link_hash_table_free (hash); | |
703 | } | |
704 | ||
c434dee6 AJ |
705 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and |
706 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
707 | hash table. */ | |
708 | ||
b34976b6 | 709 | static bfd_boolean |
351f65ca L |
710 | elf_x86_64_create_dynamic_sections (bfd *dynobj, |
711 | struct bfd_link_info *info) | |
c434dee6 | 712 | { |
351f65ca | 713 | struct elf_x86_64_link_hash_table *htab; |
c434dee6 | 714 | |
c434dee6 | 715 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
b34976b6 | 716 | return FALSE; |
c434dee6 | 717 | |
351f65ca | 718 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
719 | if (htab == NULL) |
720 | return FALSE; | |
721 | ||
c434dee6 AJ |
722 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); |
723 | if (!info->shared) | |
724 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
725 | ||
6de2ae4a | 726 | if (!htab->sdynbss |
c434dee6 AJ |
727 | || (!info->shared && !htab->srelbss)) |
728 | abort (); | |
729 | ||
b34976b6 | 730 | return TRUE; |
c434dee6 AJ |
731 | } |
732 | ||
733 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
734 | ||
735 | static void | |
351f65ca L |
736 | elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info, |
737 | struct elf_link_hash_entry *dir, | |
738 | struct elf_link_hash_entry *ind) | |
c434dee6 | 739 | { |
351f65ca | 740 | struct elf_x86_64_link_hash_entry *edir, *eind; |
c434dee6 | 741 | |
351f65ca L |
742 | edir = (struct elf_x86_64_link_hash_entry *) dir; |
743 | eind = (struct elf_x86_64_link_hash_entry *) ind; | |
c434dee6 AJ |
744 | |
745 | if (eind->dyn_relocs != NULL) | |
746 | { | |
747 | if (edir->dyn_relocs != NULL) | |
748 | { | |
e03a8ed8 L |
749 | struct elf_dyn_relocs **pp; |
750 | struct elf_dyn_relocs *p; | |
c434dee6 | 751 | |
fcfa13d2 | 752 | /* Add reloc counts against the indirect sym to the direct sym |
c434dee6 AJ |
753 | list. Merge any entries against the same section. */ |
754 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
755 | { | |
e03a8ed8 | 756 | struct elf_dyn_relocs *q; |
c434dee6 AJ |
757 | |
758 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
759 | if (q->sec == p->sec) | |
760 | { | |
761 | q->pc_count += p->pc_count; | |
762 | q->count += p->count; | |
763 | *pp = p->next; | |
764 | break; | |
765 | } | |
766 | if (q == NULL) | |
767 | pp = &p->next; | |
768 | } | |
769 | *pp = edir->dyn_relocs; | |
770 | } | |
771 | ||
772 | edir->dyn_relocs = eind->dyn_relocs; | |
773 | eind->dyn_relocs = NULL; | |
774 | } | |
775 | ||
bffbf940 JJ |
776 | if (ind->root.type == bfd_link_hash_indirect |
777 | && dir->got.refcount <= 0) | |
778 | { | |
779 | edir->tls_type = eind->tls_type; | |
780 | eind->tls_type = GOT_UNKNOWN; | |
781 | } | |
782 | ||
d40d037c AJ |
783 | if (ELIMINATE_COPY_RELOCS |
784 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
785 | && dir->dynamic_adjusted) |
786 | { | |
787 | /* If called to transfer flags for a weakdef during processing | |
788 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
789 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
790 | dir->ref_dynamic |= ind->ref_dynamic; | |
791 | dir->ref_regular |= ind->ref_regular; | |
792 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
793 | dir->needs_plt |= ind->needs_plt; | |
794 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
795 | } | |
d40d037c | 796 | else |
fcfa13d2 | 797 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
8d88c4ca NC |
798 | } |
799 | ||
b34976b6 | 800 | static bfd_boolean |
27482721 | 801 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 802 | { |
8d88c4ca NC |
803 | /* Set the right machine number for an x86-64 elf64 file. */ |
804 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 805 | return TRUE; |
8d88c4ca NC |
806 | } |
807 | ||
142411ca L |
808 | typedef union |
809 | { | |
810 | unsigned char c[2]; | |
811 | uint16_t i; | |
812 | } | |
813 | x86_64_opcode16; | |
814 | ||
815 | typedef union | |
816 | { | |
817 | unsigned char c[4]; | |
818 | uint32_t i; | |
819 | } | |
820 | x86_64_opcode32; | |
821 | ||
822 | /* Return TRUE if the TLS access code sequence support transition | |
823 | from R_TYPE. */ | |
824 | ||
825 | static bfd_boolean | |
351f65ca L |
826 | elf_x86_64_check_tls_transition (bfd *abfd, |
827 | struct bfd_link_info *info, | |
828 | asection *sec, | |
829 | bfd_byte *contents, | |
830 | Elf_Internal_Shdr *symtab_hdr, | |
831 | struct elf_link_hash_entry **sym_hashes, | |
832 | unsigned int r_type, | |
833 | const Elf_Internal_Rela *rel, | |
834 | const Elf_Internal_Rela *relend) | |
bffbf940 | 835 | { |
142411ca L |
836 | unsigned int val; |
837 | unsigned long r_symndx; | |
838 | struct elf_link_hash_entry *h; | |
839 | bfd_vma offset; | |
351f65ca | 840 | struct elf_x86_64_link_hash_table *htab; |
142411ca L |
841 | |
842 | /* Get the section contents. */ | |
843 | if (contents == NULL) | |
844 | { | |
845 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
846 | contents = elf_section_data (sec)->this_hdr.contents; | |
847 | else | |
848 | { | |
849 | /* FIXME: How to better handle error condition? */ | |
850 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
851 | return FALSE; | |
bffbf940 | 852 | |
142411ca L |
853 | /* Cache the section contents for elf_link_input_bfd. */ |
854 | elf_section_data (sec)->this_hdr.contents = contents; | |
855 | } | |
856 | } | |
857 | ||
351f65ca | 858 | htab = elf_x86_64_hash_table (info); |
142411ca | 859 | offset = rel->r_offset; |
bffbf940 | 860 | switch (r_type) |
142411ca L |
861 | { |
862 | case R_X86_64_TLSGD: | |
863 | case R_X86_64_TLSLD: | |
864 | if ((rel + 1) >= relend) | |
865 | return FALSE; | |
866 | ||
867 | if (r_type == R_X86_64_TLSGD) | |
868 | { | |
52bc799a | 869 | /* Check transition from GD access model. For 64bit, only |
142411ca L |
870 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
871 | .word 0x6666; rex64; call __tls_get_addr | |
52bc799a L |
872 | can transit to different access model. For 32bit, only |
873 | leaq foo@tlsgd(%rip), %rdi | |
874 | .word 0x6666; rex64; call __tls_get_addr | |
142411ca L |
875 | can transit to different access model. */ |
876 | ||
52bc799a L |
877 | static x86_64_opcode32 call = { { 0x66, 0x66, 0x48, 0xe8 } }; |
878 | if ((offset + 12) > sec->size | |
142411ca L |
879 | || bfd_get_32 (abfd, contents + offset + 4) != call.i) |
880 | return FALSE; | |
52bc799a L |
881 | |
882 | if (ABI_64_P (abfd)) | |
883 | { | |
884 | static x86_64_opcode32 leaq = { { 0x66, 0x48, 0x8d, 0x3d } }; | |
885 | if (offset < 4 | |
886 | || bfd_get_32 (abfd, contents + offset - 4) != leaq.i) | |
887 | return FALSE; | |
888 | } | |
889 | else | |
890 | { | |
891 | static x86_64_opcode16 lea = { { 0x8d, 0x3d } }; | |
892 | if (offset < 3 | |
893 | || bfd_get_8 (abfd, contents + offset - 3) != 0x48 | |
894 | || bfd_get_16 (abfd, contents + offset - 2) != lea.i) | |
895 | return FALSE; | |
896 | } | |
142411ca L |
897 | } |
898 | else | |
899 | { | |
900 | /* Check transition from LD access model. Only | |
901 | leaq foo@tlsld(%rip), %rdi; | |
902 | call __tls_get_addr | |
903 | can transit to different access model. */ | |
904 | ||
905 | static x86_64_opcode32 ld = { { 0x48, 0x8d, 0x3d, 0xe8 } }; | |
906 | x86_64_opcode32 op; | |
907 | ||
908 | if (offset < 3 || (offset + 9) > sec->size) | |
909 | return FALSE; | |
910 | ||
911 | op.i = bfd_get_32 (abfd, contents + offset - 3); | |
912 | op.c[3] = bfd_get_8 (abfd, contents + offset + 4); | |
913 | if (op.i != ld.i) | |
914 | return FALSE; | |
915 | } | |
916 | ||
351f65ca | 917 | r_symndx = htab->r_sym (rel[1].r_info); |
142411ca L |
918 | if (r_symndx < symtab_hdr->sh_info) |
919 | return FALSE; | |
920 | ||
921 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
c4fb387b L |
922 | /* Use strncmp to check __tls_get_addr since __tls_get_addr |
923 | may be versioned. */ | |
142411ca L |
924 | return (h != NULL |
925 | && h->root.root.string != NULL | |
351f65ca L |
926 | && (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32 |
927 | || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32) | |
c4fb387b L |
928 | && (strncmp (h->root.root.string, |
929 | "__tls_get_addr", 14) == 0)); | |
142411ca L |
930 | |
931 | case R_X86_64_GOTTPOFF: | |
932 | /* Check transition from IE access model: | |
4a4c5f25 L |
933 | mov foo@gottpoff(%rip), %reg |
934 | add foo@gottpoff(%rip), %reg | |
142411ca L |
935 | */ |
936 | ||
4a4c5f25 L |
937 | /* Check REX prefix first. */ |
938 | if (offset >= 3 && (offset + 4) <= sec->size) | |
939 | { | |
940 | val = bfd_get_8 (abfd, contents + offset - 3); | |
941 | if (val != 0x48 && val != 0x4c) | |
942 | { | |
943 | /* X32 may have 0x44 REX prefix or no REX prefix. */ | |
944 | if (ABI_64_P (abfd)) | |
945 | return FALSE; | |
946 | } | |
947 | } | |
948 | else | |
949 | { | |
950 | /* X32 may not have any REX prefix. */ | |
951 | if (ABI_64_P (abfd)) | |
952 | return FALSE; | |
953 | if (offset < 2 || (offset + 3) > sec->size) | |
954 | return FALSE; | |
955 | } | |
142411ca L |
956 | |
957 | val = bfd_get_8 (abfd, contents + offset - 2); | |
958 | if (val != 0x8b && val != 0x03) | |
959 | return FALSE; | |
960 | ||
961 | val = bfd_get_8 (abfd, contents + offset - 1); | |
962 | return (val & 0xc7) == 5; | |
963 | ||
964 | case R_X86_64_GOTPC32_TLSDESC: | |
965 | /* Check transition from GDesc access model: | |
966 | leaq x@tlsdesc(%rip), %rax | |
967 | ||
968 | Make sure it's a leaq adding rip to a 32-bit offset | |
969 | into any register, although it's probably almost always | |
970 | going to be rax. */ | |
971 | ||
972 | if (offset < 3 || (offset + 4) > sec->size) | |
973 | return FALSE; | |
974 | ||
975 | val = bfd_get_8 (abfd, contents + offset - 3); | |
976 | if ((val & 0xfb) != 0x48) | |
977 | return FALSE; | |
978 | ||
979 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
980 | return FALSE; | |
981 | ||
982 | val = bfd_get_8 (abfd, contents + offset - 1); | |
983 | return (val & 0xc7) == 0x05; | |
984 | ||
985 | case R_X86_64_TLSDESC_CALL: | |
986 | /* Check transition from GDesc access model: | |
987 | call *x@tlsdesc(%rax) | |
988 | */ | |
989 | if (offset + 2 <= sec->size) | |
990 | { | |
991 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
992 | static x86_64_opcode16 call = { { 0xff, 0x10 } }; | |
993 | return bfd_get_16 (abfd, contents + offset) == call.i; | |
994 | } | |
995 | ||
996 | return FALSE; | |
997 | ||
998 | default: | |
999 | abort (); | |
1000 | } | |
1001 | } | |
1002 | ||
1003 | /* Return TRUE if the TLS access transition is OK or no transition | |
1004 | will be performed. Update R_TYPE if there is a transition. */ | |
1005 | ||
1006 | static bfd_boolean | |
351f65ca L |
1007 | elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, |
1008 | asection *sec, bfd_byte *contents, | |
1009 | Elf_Internal_Shdr *symtab_hdr, | |
1010 | struct elf_link_hash_entry **sym_hashes, | |
1011 | unsigned int *r_type, int tls_type, | |
1012 | const Elf_Internal_Rela *rel, | |
1013 | const Elf_Internal_Rela *relend, | |
1014 | struct elf_link_hash_entry *h, | |
1015 | unsigned long r_symndx) | |
142411ca L |
1016 | { |
1017 | unsigned int from_type = *r_type; | |
1018 | unsigned int to_type = from_type; | |
1019 | bfd_boolean check = TRUE; | |
1020 | ||
bb1cb422 L |
1021 | /* Skip TLS transition for functions. */ |
1022 | if (h != NULL | |
1023 | && (h->type == STT_FUNC | |
1024 | || h->type == STT_GNU_IFUNC)) | |
1025 | return TRUE; | |
1026 | ||
142411ca | 1027 | switch (from_type) |
bffbf940 JJ |
1028 | { |
1029 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
1030 | case R_X86_64_GOTPC32_TLSDESC: |
1031 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 1032 | case R_X86_64_GOTTPOFF: |
1d85728f | 1033 | if (info->executable) |
142411ca L |
1034 | { |
1035 | if (h == NULL) | |
1036 | to_type = R_X86_64_TPOFF32; | |
1037 | else | |
1038 | to_type = R_X86_64_GOTTPOFF; | |
1039 | } | |
1040 | ||
351f65ca | 1041 | /* When we are called from elf_x86_64_relocate_section, |
142411ca L |
1042 | CONTENTS isn't NULL and there may be additional transitions |
1043 | based on TLS_TYPE. */ | |
1044 | if (contents != NULL) | |
1045 | { | |
1046 | unsigned int new_to_type = to_type; | |
1047 | ||
1d85728f | 1048 | if (info->executable |
142411ca L |
1049 | && h != NULL |
1050 | && h->dynindx == -1 | |
1051 | && tls_type == GOT_TLS_IE) | |
1052 | new_to_type = R_X86_64_TPOFF32; | |
1053 | ||
1054 | if (to_type == R_X86_64_TLSGD | |
1055 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
1056 | || to_type == R_X86_64_TLSDESC_CALL) | |
1057 | { | |
1058 | if (tls_type == GOT_TLS_IE) | |
1059 | new_to_type = R_X86_64_GOTTPOFF; | |
1060 | } | |
1061 | ||
1062 | /* We checked the transition before when we were called from | |
351f65ca | 1063 | elf_x86_64_check_relocs. We only want to check the new |
142411ca L |
1064 | transition which hasn't been checked before. */ |
1065 | check = new_to_type != to_type && from_type == to_type; | |
1066 | to_type = new_to_type; | |
1067 | } | |
1068 | ||
1069 | break; | |
1070 | ||
bffbf940 | 1071 | case R_X86_64_TLSLD: |
1d85728f | 1072 | if (info->executable) |
142411ca L |
1073 | to_type = R_X86_64_TPOFF32; |
1074 | break; | |
1075 | ||
1076 | default: | |
1077 | return TRUE; | |
bffbf940 JJ |
1078 | } |
1079 | ||
142411ca L |
1080 | /* Return TRUE if there is no transition. */ |
1081 | if (from_type == to_type) | |
1082 | return TRUE; | |
1083 | ||
1084 | /* Check if the transition can be performed. */ | |
1085 | if (check | |
351f65ca L |
1086 | && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents, |
1087 | symtab_hdr, sym_hashes, | |
1088 | from_type, rel, relend)) | |
142411ca | 1089 | { |
2f629d23 | 1090 | reloc_howto_type *from, *to; |
4c544807 | 1091 | const char *name; |
142411ca | 1092 | |
351f65ca L |
1093 | from = elf_x86_64_rtype_to_howto (abfd, from_type); |
1094 | to = elf_x86_64_rtype_to_howto (abfd, to_type); | |
142411ca | 1095 | |
4c544807 L |
1096 | if (h) |
1097 | name = h->root.root.string; | |
1098 | else | |
1099 | { | |
351f65ca | 1100 | struct elf_x86_64_link_hash_table *htab; |
4dfe6ac6 | 1101 | |
351f65ca | 1102 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1103 | if (htab == NULL) |
1104 | name = "*unknown*"; | |
1105 | else | |
1106 | { | |
1107 | Elf_Internal_Sym *isym; | |
1108 | ||
1109 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1110 | abfd, r_symndx); | |
1111 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1112 | } | |
4c544807 L |
1113 | } |
1114 | ||
142411ca L |
1115 | (*_bfd_error_handler) |
1116 | (_("%B: TLS transition from %s to %s against `%s' at 0x%lx " | |
1117 | "in section `%A' failed"), | |
4c544807 | 1118 | abfd, sec, from->name, to->name, name, |
142411ca L |
1119 | (unsigned long) rel->r_offset); |
1120 | bfd_set_error (bfd_error_bad_value); | |
1121 | return FALSE; | |
1122 | } | |
1123 | ||
1124 | *r_type = to_type; | |
1125 | return TRUE; | |
bffbf940 JJ |
1126 | } |
1127 | ||
70256ad8 | 1128 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
1129 | calculate needed space in the global offset table, procedure |
1130 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 1131 | |
b34976b6 | 1132 | static bfd_boolean |
351f65ca L |
1133 | elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
1134 | asection *sec, | |
1135 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 1136 | { |
351f65ca | 1137 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
1138 | Elf_Internal_Shdr *symtab_hdr; |
1139 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
1140 | const Elf_Internal_Rela *rel; |
1141 | const Elf_Internal_Rela *rel_end; | |
70256ad8 AJ |
1142 | asection *sreloc; |
1143 | ||
1049f94e | 1144 | if (info->relocatable) |
b34976b6 | 1145 | return TRUE; |
70256ad8 | 1146 | |
0ffa91dd NC |
1147 | BFD_ASSERT (is_x86_64_elf (abfd)); |
1148 | ||
351f65ca | 1149 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1150 | if (htab == NULL) |
1151 | return FALSE; | |
1152 | ||
0ffa91dd | 1153 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 1154 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 1155 | |
c434dee6 | 1156 | sreloc = NULL; |
cbe950e9 | 1157 | |
70256ad8 AJ |
1158 | rel_end = relocs + sec->reloc_count; |
1159 | for (rel = relocs; rel < rel_end; rel++) | |
1160 | { | |
bffbf940 | 1161 | unsigned int r_type; |
70256ad8 AJ |
1162 | unsigned long r_symndx; |
1163 | struct elf_link_hash_entry *h; | |
4c544807 L |
1164 | Elf_Internal_Sym *isym; |
1165 | const char *name; | |
70256ad8 | 1166 | |
351f65ca L |
1167 | r_symndx = htab->r_sym (rel->r_info); |
1168 | r_type = ELF32_R_TYPE (rel->r_info); | |
c434dee6 AJ |
1169 | |
1170 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
1171 | { | |
d003868e AM |
1172 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
1173 | abfd, r_symndx); | |
b34976b6 | 1174 | return FALSE; |
c434dee6 AJ |
1175 | } |
1176 | ||
70256ad8 | 1177 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1178 | { |
1179 | /* A local symbol. */ | |
c2e61a4e L |
1180 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1181 | abfd, r_symndx); | |
1182 | if (isym == NULL) | |
1183 | return FALSE; | |
c25bc9fc L |
1184 | |
1185 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
351f65ca | 1186 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 1187 | { |
351f65ca L |
1188 | h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, |
1189 | TRUE); | |
c25bc9fc | 1190 | if (h == NULL) |
c2e61a4e | 1191 | return FALSE; |
6bbec505 | 1192 | |
c25bc9fc L |
1193 | /* Fake a STT_GNU_IFUNC symbol. */ |
1194 | h->type = STT_GNU_IFUNC; | |
1195 | h->def_regular = 1; | |
1196 | h->ref_regular = 1; | |
1197 | h->forced_local = 1; | |
1198 | h->root.type = bfd_link_hash_defined; | |
1199 | } | |
1200 | else | |
1201 | h = NULL; | |
1202 | } | |
70256ad8 | 1203 | else |
71cb9464 | 1204 | { |
4c544807 | 1205 | isym = NULL; |
71cb9464 L |
1206 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1207 | while (h->root.type == bfd_link_hash_indirect | |
1208 | || h->root.type == bfd_link_hash_warning) | |
1209 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1210 | } |
cbe950e9 | 1211 | |
d1534d16 L |
1212 | /* Check invalid x32 relocations. */ |
1213 | if (!ABI_64_P (abfd)) | |
1214 | switch (r_type) | |
1215 | { | |
1216 | default: | |
1217 | break; | |
1218 | ||
1219 | case R_X86_64_64: | |
1220 | case R_X86_64_DTPOFF64: | |
1221 | case R_X86_64_TPOFF64: | |
1222 | case R_X86_64_PC64: | |
1223 | case R_X86_64_GOTOFF64: | |
1224 | case R_X86_64_GOT64: | |
1225 | case R_X86_64_GOTPCREL64: | |
1226 | case R_X86_64_GOTPC64: | |
1227 | case R_X86_64_GOTPLT64: | |
1228 | case R_X86_64_PLTOFF64: | |
1229 | { | |
1230 | if (h) | |
1231 | name = h->root.root.string; | |
1232 | else | |
1233 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1234 | NULL); | |
1235 | (*_bfd_error_handler) | |
1236 | (_("%B: relocation %s against symbol `%s' isn't " | |
1237 | "supported in x32 mode"), abfd, | |
1238 | x86_64_elf_howto_table[r_type].name, name); | |
1239 | bfd_set_error (bfd_error_bad_value); | |
1240 | return FALSE; | |
1241 | } | |
1242 | break; | |
1243 | } | |
1244 | ||
c25bc9fc L |
1245 | if (h != NULL) |
1246 | { | |
cbe950e9 L |
1247 | /* Create the ifunc sections for static executables. If we |
1248 | never see an indirect function symbol nor we are building | |
1249 | a static executable, those sections will be empty and | |
1250 | won't appear in output. */ | |
1251 | switch (r_type) | |
1252 | { | |
1253 | default: | |
1254 | break; | |
1255 | ||
1256 | case R_X86_64_32S: | |
1257 | case R_X86_64_32: | |
1258 | case R_X86_64_64: | |
1259 | case R_X86_64_PC32: | |
1260 | case R_X86_64_PC64: | |
1261 | case R_X86_64_PLT32: | |
1262 | case R_X86_64_GOTPCREL: | |
1263 | case R_X86_64_GOTPCREL64: | |
6de2ae4a | 1264 | if (!_bfd_elf_create_ifunc_sections (abfd, info)) |
c2e61a4e | 1265 | return FALSE; |
cbe950e9 L |
1266 | break; |
1267 | } | |
1268 | ||
1269 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle | |
1270 | it here if it is defined in a non-shared object. */ | |
1271 | if (h->type == STT_GNU_IFUNC | |
1272 | && h->def_regular) | |
1273 | { | |
1274 | /* It is referenced by a non-shared object. */ | |
1275 | h->ref_regular = 1; | |
7ae26bc1 | 1276 | h->needs_plt = 1; |
6bbec505 | 1277 | |
cbe950e9 L |
1278 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
1279 | h->plt.refcount += 1; | |
1280 | ||
1281 | /* STT_GNU_IFUNC needs dynamic sections. */ | |
1282 | if (htab->elf.dynobj == NULL) | |
1283 | htab->elf.dynobj = abfd; | |
1284 | ||
1285 | switch (r_type) | |
1286 | { | |
048cbda4 | 1287 | default: |
4c544807 L |
1288 | if (h->root.root.string) |
1289 | name = h->root.root.string; | |
1290 | else | |
1291 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1292 | NULL); | |
048cbda4 L |
1293 | (*_bfd_error_handler) |
1294 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
1295 | "symbol `%s' isn't handled by %s"), abfd, | |
1296 | x86_64_elf_howto_table[r_type].name, | |
4c544807 | 1297 | name, __FUNCTION__); |
048cbda4 | 1298 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1299 | return FALSE; |
cbe950e9 | 1300 | |
248775ba L |
1301 | case R_X86_64_32: |
1302 | if (ABI_64_P (abfd)) | |
1303 | goto not_pointer; | |
710ab287 L |
1304 | case R_X86_64_64: |
1305 | h->non_got_ref = 1; | |
1306 | h->pointer_equality_needed = 1; | |
1307 | if (info->shared) | |
1308 | { | |
710ab287 L |
1309 | /* We must copy these reloc types into the output |
1310 | file. Create a reloc section in dynobj and | |
1311 | make room for this reloc. */ | |
e03a8ed8 L |
1312 | sreloc = _bfd_elf_create_ifunc_dyn_reloc |
1313 | (abfd, info, sec, sreloc, | |
351f65ca | 1314 | &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs); |
710ab287 | 1315 | if (sreloc == NULL) |
c2e61a4e | 1316 | return FALSE; |
710ab287 L |
1317 | } |
1318 | break; | |
1319 | ||
cbe950e9 | 1320 | case R_X86_64_32S: |
cbe950e9 L |
1321 | case R_X86_64_PC32: |
1322 | case R_X86_64_PC64: | |
248775ba | 1323 | not_pointer: |
cbe950e9 L |
1324 | h->non_got_ref = 1; |
1325 | if (r_type != R_X86_64_PC32 | |
1326 | && r_type != R_X86_64_PC64) | |
1327 | h->pointer_equality_needed = 1; | |
1328 | break; | |
1329 | ||
1330 | case R_X86_64_PLT32: | |
1331 | break; | |
1332 | ||
1333 | case R_X86_64_GOTPCREL: | |
1334 | case R_X86_64_GOTPCREL64: | |
7afd84dc | 1335 | h->got.refcount += 1; |
6de2ae4a L |
1336 | if (htab->elf.sgot == NULL |
1337 | && !_bfd_elf_create_got_section (htab->elf.dynobj, | |
1338 | info)) | |
c2e61a4e | 1339 | return FALSE; |
cbe950e9 L |
1340 | break; |
1341 | } | |
1342 | ||
1343 | continue; | |
1344 | } | |
71cb9464 | 1345 | } |
70256ad8 | 1346 | |
351f65ca L |
1347 | if (! elf_x86_64_tls_transition (info, abfd, sec, NULL, |
1348 | symtab_hdr, sym_hashes, | |
1349 | &r_type, GOT_UNKNOWN, | |
1350 | rel, rel_end, h, r_symndx)) | |
c2e61a4e | 1351 | return FALSE; |
142411ca | 1352 | |
bffbf940 | 1353 | switch (r_type) |
70256ad8 | 1354 | { |
bffbf940 JJ |
1355 | case R_X86_64_TLSLD: |
1356 | htab->tls_ld_got.refcount += 1; | |
1357 | goto create_got; | |
1358 | ||
1359 | case R_X86_64_TPOFF32: | |
351f65ca | 1360 | if (!info->executable && ABI_64_P (abfd)) |
70256ad8 | 1361 | { |
09a24cbf | 1362 | if (h) |
4c544807 L |
1363 | name = h->root.root.string; |
1364 | else | |
1365 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1366 | NULL); | |
bffbf940 | 1367 | (*_bfd_error_handler) |
d003868e AM |
1368 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
1369 | abfd, | |
4c544807 | 1370 | x86_64_elf_howto_table[r_type].name, name); |
bffbf940 | 1371 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1372 | return FALSE; |
70256ad8 | 1373 | } |
bffbf940 | 1374 | break; |
c434dee6 | 1375 | |
bffbf940 | 1376 | case R_X86_64_GOTTPOFF: |
1d85728f | 1377 | if (!info->executable) |
bffbf940 JJ |
1378 | info->flags |= DF_STATIC_TLS; |
1379 | /* Fall through */ | |
70256ad8 | 1380 | |
bffbf940 JJ |
1381 | case R_X86_64_GOT32: |
1382 | case R_X86_64_GOTPCREL: | |
1383 | case R_X86_64_TLSGD: | |
7b81dfbb AJ |
1384 | case R_X86_64_GOT64: |
1385 | case R_X86_64_GOTPCREL64: | |
1386 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
1387 | case R_X86_64_GOTPC32_TLSDESC: |
1388 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
1389 | /* This symbol requires a global offset table entry. */ |
1390 | { | |
1391 | int tls_type, old_tls_type; | |
1392 | ||
1393 | switch (r_type) | |
1394 | { | |
1395 | default: tls_type = GOT_NORMAL; break; | |
1396 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
1397 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
1398 | case R_X86_64_GOTPC32_TLSDESC: |
1399 | case R_X86_64_TLSDESC_CALL: | |
1400 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
1401 | } |
1402 | ||
1403 | if (h != NULL) | |
1404 | { | |
7b81dfbb AJ |
1405 | if (r_type == R_X86_64_GOTPLT64) |
1406 | { | |
1407 | /* This relocation indicates that we also need | |
1408 | a PLT entry, as this is a function. We don't need | |
1409 | a PLT entry for local symbols. */ | |
1410 | h->needs_plt = 1; | |
1411 | h->plt.refcount += 1; | |
1412 | } | |
bffbf940 | 1413 | h->got.refcount += 1; |
351f65ca | 1414 | old_tls_type = elf_x86_64_hash_entry (h)->tls_type; |
bffbf940 JJ |
1415 | } |
1416 | else | |
1417 | { | |
1418 | bfd_signed_vma *local_got_refcounts; | |
1419 | ||
1420 | /* This is a global offset table entry for a local symbol. */ | |
1421 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1422 | if (local_got_refcounts == NULL) | |
1423 | { | |
1424 | bfd_size_type size; | |
1425 | ||
1426 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
1427 | size *= sizeof (bfd_signed_vma) |
1428 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
1429 | local_got_refcounts = ((bfd_signed_vma *) |
1430 | bfd_zalloc (abfd, size)); | |
1431 | if (local_got_refcounts == NULL) | |
c2e61a4e | 1432 | return FALSE; |
bffbf940 | 1433 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
351f65ca | 1434 | elf_x86_64_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 1435 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
351f65ca | 1436 | elf_x86_64_local_got_tls_type (abfd) |
67a4f2b7 | 1437 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 JJ |
1438 | } |
1439 | local_got_refcounts[r_symndx] += 1; | |
1440 | old_tls_type | |
351f65ca | 1441 | = elf_x86_64_local_got_tls_type (abfd) [r_symndx]; |
bffbf940 JJ |
1442 | } |
1443 | ||
1444 | /* If a TLS symbol is accessed using IE at least once, | |
1445 | there is no point to use dynamic model for it. */ | |
1446 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
1447 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
1448 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 1449 | { |
67a4f2b7 | 1450 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 1451 | tls_type = old_tls_type; |
67a4f2b7 AO |
1452 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
1453 | && GOT_TLS_GD_ANY_P (tls_type)) | |
1454 | tls_type |= old_tls_type; | |
bffbf940 JJ |
1455 | else |
1456 | { | |
09a24cbf | 1457 | if (h) |
4c544807 L |
1458 | name = h->root.root.string; |
1459 | else | |
1460 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
1461 | isym, NULL); | |
bffbf940 | 1462 | (*_bfd_error_handler) |
1f7a4e42 | 1463 | (_("%B: '%s' accessed both as normal and thread local symbol"), |
4c544807 | 1464 | abfd, name); |
c2e61a4e | 1465 | return FALSE; |
bffbf940 JJ |
1466 | } |
1467 | } | |
1468 | ||
1469 | if (old_tls_type != tls_type) | |
1470 | { | |
1471 | if (h != NULL) | |
351f65ca | 1472 | elf_x86_64_hash_entry (h)->tls_type = tls_type; |
bffbf940 | 1473 | else |
351f65ca | 1474 | elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type; |
bffbf940 JJ |
1475 | } |
1476 | } | |
c434dee6 AJ |
1477 | /* Fall through */ |
1478 | ||
d6ab8113 JB |
1479 | case R_X86_64_GOTOFF64: |
1480 | case R_X86_64_GOTPC32: | |
7b81dfbb | 1481 | case R_X86_64_GOTPC64: |
bffbf940 | 1482 | create_got: |
6de2ae4a | 1483 | if (htab->elf.sgot == NULL) |
c434dee6 AJ |
1484 | { |
1485 | if (htab->elf.dynobj == NULL) | |
1486 | htab->elf.dynobj = abfd; | |
6de2ae4a L |
1487 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, |
1488 | info)) | |
c2e61a4e | 1489 | return FALSE; |
c434dee6 | 1490 | } |
70256ad8 AJ |
1491 | break; |
1492 | ||
1493 | case R_X86_64_PLT32: | |
1494 | /* This symbol requires a procedure linkage table entry. We | |
407443a3 AJ |
1495 | actually build the entry in adjust_dynamic_symbol, |
1496 | because this might be a case of linking PIC code which is | |
1497 | never referenced by a dynamic object, in which case we | |
1498 | don't need to generate a procedure linkage table entry | |
1499 | after all. */ | |
70256ad8 AJ |
1500 | |
1501 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 1502 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
1503 | if (h == NULL) |
1504 | continue; | |
1505 | ||
f5385ebf | 1506 | h->needs_plt = 1; |
51b64d56 | 1507 | h->plt.refcount += 1; |
70256ad8 AJ |
1508 | break; |
1509 | ||
7b81dfbb AJ |
1510 | case R_X86_64_PLTOFF64: |
1511 | /* This tries to form the 'address' of a function relative | |
1512 | to GOT. For global symbols we need a PLT entry. */ | |
1513 | if (h != NULL) | |
1514 | { | |
1515 | h->needs_plt = 1; | |
1516 | h->plt.refcount += 1; | |
1517 | } | |
1518 | goto create_got; | |
1519 | ||
248775ba L |
1520 | case R_X86_64_32: |
1521 | if (!ABI_64_P (abfd)) | |
1522 | goto pointer; | |
cc78d0af AJ |
1523 | case R_X86_64_8: |
1524 | case R_X86_64_16: | |
70256ad8 | 1525 | case R_X86_64_32S: |
1b71fb54 AJ |
1526 | /* Let's help debug shared library creation. These relocs |
1527 | cannot be used in shared libs. Don't error out for | |
1528 | sections we don't care about, such as debug sections or | |
1529 | non-constant sections. */ | |
1530 | if (info->shared | |
1531 | && (sec->flags & SEC_ALLOC) != 0 | |
1532 | && (sec->flags & SEC_READONLY) != 0) | |
1533 | { | |
09a24cbf | 1534 | if (h) |
4c544807 L |
1535 | name = h->root.root.string; |
1536 | else | |
1537 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1b71fb54 | 1538 | (*_bfd_error_handler) |
d003868e | 1539 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
4c544807 | 1540 | abfd, x86_64_elf_howto_table[r_type].name, name); |
1b71fb54 | 1541 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1542 | return FALSE; |
1b71fb54 AJ |
1543 | } |
1544 | /* Fall through. */ | |
1545 | ||
c434dee6 AJ |
1546 | case R_X86_64_PC8: |
1547 | case R_X86_64_PC16: | |
70256ad8 | 1548 | case R_X86_64_PC32: |
d6ab8113 | 1549 | case R_X86_64_PC64: |
1b71fb54 | 1550 | case R_X86_64_64: |
248775ba | 1551 | pointer: |
710ab287 | 1552 | if (h != NULL && info->executable) |
c434dee6 AJ |
1553 | { |
1554 | /* If this reloc is in a read-only section, we might | |
1555 | need a copy reloc. We can't check reliably at this | |
1556 | stage whether the section is read-only, as input | |
1557 | sections have not yet been mapped to output sections. | |
1558 | Tentatively set the flag for now, and correct in | |
1559 | adjust_dynamic_symbol. */ | |
f5385ebf | 1560 | h->non_got_ref = 1; |
c434dee6 AJ |
1561 | |
1562 | /* We may need a .plt entry if the function this reloc | |
1563 | refers to is in a shared lib. */ | |
1564 | h->plt.refcount += 1; | |
d6ab8113 | 1565 | if (r_type != R_X86_64_PC32 && r_type != R_X86_64_PC64) |
f5385ebf | 1566 | h->pointer_equality_needed = 1; |
c434dee6 | 1567 | } |
70256ad8 AJ |
1568 | |
1569 | /* If we are creating a shared library, and this is a reloc | |
1570 | against a global symbol, or a non PC relative reloc | |
1571 | against a local symbol, then we need to copy the reloc | |
1572 | into the shared library. However, if we are linking with | |
1573 | -Bsymbolic, we do not need to copy a reloc against a | |
1574 | global symbol which is defined in an object we are | |
407443a3 | 1575 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
1576 | this point we have not seen all the input files, so it is |
1577 | possible that DEF_REGULAR is not set now but will be set | |
c434dee6 AJ |
1578 | later (it is never cleared). In case of a weak definition, |
1579 | DEF_REGULAR may be cleared later by a strong definition in | |
1580 | a shared library. We account for that possibility below by | |
1581 | storing information in the relocs_copied field of the hash | |
1582 | table entry. A similar situation occurs when creating | |
1583 | shared libraries and symbol visibility changes render the | |
1584 | symbol local. | |
1585 | ||
1586 | If on the other hand, we are creating an executable, we | |
1587 | may need to keep relocations for symbols satisfied by a | |
1588 | dynamic library if we manage to avoid copy relocs for the | |
0f88be7a | 1589 | symbol. */ |
c434dee6 AJ |
1590 | if ((info->shared |
1591 | && (sec->flags & SEC_ALLOC) != 0 | |
d8045f23 | 1592 | && (! IS_X86_64_PCREL_TYPE (r_type) |
c434dee6 | 1593 | || (h != NULL |
55255dae | 1594 | && (! SYMBOLIC_BIND (info, h) |
c434dee6 | 1595 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 1596 | || !h->def_regular)))) |
d40d037c AJ |
1597 | || (ELIMINATE_COPY_RELOCS |
1598 | && !info->shared | |
c434dee6 AJ |
1599 | && (sec->flags & SEC_ALLOC) != 0 |
1600 | && h != NULL | |
1601 | && (h->root.type == bfd_link_hash_defweak | |
0f88be7a | 1602 | || !h->def_regular))) |
70256ad8 | 1603 | { |
e03a8ed8 L |
1604 | struct elf_dyn_relocs *p; |
1605 | struct elf_dyn_relocs **head; | |
c434dee6 AJ |
1606 | |
1607 | /* We must copy these reloc types into the output file. | |
1608 | Create a reloc section in dynobj and make room for | |
1609 | this reloc. */ | |
70256ad8 AJ |
1610 | if (sreloc == NULL) |
1611 | { | |
c434dee6 AJ |
1612 | if (htab->elf.dynobj == NULL) |
1613 | htab->elf.dynobj = abfd; | |
1614 | ||
83bac4b0 | 1615 | sreloc = _bfd_elf_make_dynamic_reloc_section |
82e96e07 L |
1616 | (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2, |
1617 | abfd, /*rela?*/ TRUE); | |
70256ad8 | 1618 | |
70256ad8 | 1619 | if (sreloc == NULL) |
c2e61a4e | 1620 | return FALSE; |
70256ad8 AJ |
1621 | } |
1622 | ||
c434dee6 AJ |
1623 | /* If this is a global symbol, we count the number of |
1624 | relocations we need for this symbol. */ | |
1625 | if (h != NULL) | |
70256ad8 | 1626 | { |
351f65ca | 1627 | head = &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs; |
c434dee6 AJ |
1628 | } |
1629 | else | |
1630 | { | |
1631 | /* Track dynamic relocs needed for local syms too. | |
1632 | We really need local syms available to do this | |
1633 | easily. Oh well. */ | |
c434dee6 | 1634 | asection *s; |
87d72d41 | 1635 | void **vpp; |
87d72d41 AM |
1636 | |
1637 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1638 | abfd, r_symndx); | |
1639 | if (isym == NULL) | |
1640 | return FALSE; | |
1641 | ||
1642 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 1643 | if (s == NULL) |
87d72d41 | 1644 | s = sec; |
70256ad8 | 1645 | |
e81d3500 DD |
1646 | /* Beware of type punned pointers vs strict aliasing |
1647 | rules. */ | |
1648 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 1649 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 1650 | } |
70256ad8 | 1651 | |
c434dee6 AJ |
1652 | p = *head; |
1653 | if (p == NULL || p->sec != sec) | |
1654 | { | |
1655 | bfd_size_type amt = sizeof *p; | |
d8045f23 | 1656 | |
e03a8ed8 | 1657 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 1658 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 1659 | if (p == NULL) |
c2e61a4e | 1660 | return FALSE; |
c434dee6 AJ |
1661 | p->next = *head; |
1662 | *head = p; | |
1663 | p->sec = sec; | |
1664 | p->count = 0; | |
1665 | p->pc_count = 0; | |
70256ad8 | 1666 | } |
c434dee6 AJ |
1667 | |
1668 | p->count += 1; | |
d8045f23 | 1669 | if (IS_X86_64_PCREL_TYPE (r_type)) |
c434dee6 | 1670 | p->pc_count += 1; |
70256ad8 AJ |
1671 | } |
1672 | break; | |
fe4770f4 AJ |
1673 | |
1674 | /* This relocation describes the C++ object vtable hierarchy. | |
1675 | Reconstruct it for later use during GC. */ | |
1676 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 1677 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
c2e61a4e | 1678 | return FALSE; |
fe4770f4 AJ |
1679 | break; |
1680 | ||
1681 | /* This relocation describes which C++ vtable entries are actually | |
1682 | used. Record for later use during GC. */ | |
1683 | case R_X86_64_GNU_VTENTRY: | |
d17e0c6e JB |
1684 | BFD_ASSERT (h != NULL); |
1685 | if (h != NULL | |
1686 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
c2e61a4e | 1687 | return FALSE; |
fe4770f4 | 1688 | break; |
c434dee6 AJ |
1689 | |
1690 | default: | |
1691 | break; | |
70256ad8 AJ |
1692 | } |
1693 | } | |
1694 | ||
b34976b6 | 1695 | return TRUE; |
70256ad8 AJ |
1696 | } |
1697 | ||
1698 | /* Return the section that should be marked against GC for a given | |
407443a3 | 1699 | relocation. */ |
70256ad8 AJ |
1700 | |
1701 | static asection * | |
351f65ca L |
1702 | elf_x86_64_gc_mark_hook (asection *sec, |
1703 | struct bfd_link_info *info, | |
1704 | Elf_Internal_Rela *rel, | |
1705 | struct elf_link_hash_entry *h, | |
1706 | Elf_Internal_Sym *sym) | |
70256ad8 AJ |
1707 | { |
1708 | if (h != NULL) | |
351f65ca | 1709 | switch (ELF32_R_TYPE (rel->r_info)) |
07adf181 AM |
1710 | { |
1711 | case R_X86_64_GNU_VTINHERIT: | |
1712 | case R_X86_64_GNU_VTENTRY: | |
1713 | return NULL; | |
1714 | } | |
1715 | ||
1716 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
70256ad8 AJ |
1717 | } |
1718 | ||
407443a3 | 1719 | /* Update the got entry reference counts for the section being removed. */ |
70256ad8 | 1720 | |
b34976b6 | 1721 | static bfd_boolean |
351f65ca L |
1722 | elf_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, |
1723 | asection *sec, | |
1724 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 1725 | { |
351f65ca | 1726 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
1727 | Elf_Internal_Shdr *symtab_hdr; |
1728 | struct elf_link_hash_entry **sym_hashes; | |
1729 | bfd_signed_vma *local_got_refcounts; | |
1730 | const Elf_Internal_Rela *rel, *relend; | |
c434dee6 | 1731 | |
7dda2462 TG |
1732 | if (info->relocatable) |
1733 | return TRUE; | |
1734 | ||
351f65ca | 1735 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1736 | if (htab == NULL) |
1737 | return FALSE; | |
1738 | ||
c434dee6 | 1739 | elf_section_data (sec)->local_dynrel = NULL; |
70256ad8 | 1740 | |
0ffa91dd | 1741 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 AJ |
1742 | sym_hashes = elf_sym_hashes (abfd); |
1743 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1744 | ||
351f65ca | 1745 | htab = elf_x86_64_hash_table (info); |
70256ad8 AJ |
1746 | relend = relocs + sec->reloc_count; |
1747 | for (rel = relocs; rel < relend; rel++) | |
26e41594 AM |
1748 | { |
1749 | unsigned long r_symndx; | |
1750 | unsigned int r_type; | |
1751 | struct elf_link_hash_entry *h = NULL; | |
70256ad8 | 1752 | |
351f65ca | 1753 | r_symndx = htab->r_sym (rel->r_info); |
26e41594 AM |
1754 | if (r_symndx >= symtab_hdr->sh_info) |
1755 | { | |
26e41594 | 1756 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3eb128b2 AM |
1757 | while (h->root.type == bfd_link_hash_indirect |
1758 | || h->root.type == bfd_link_hash_warning) | |
1759 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
26e41594 | 1760 | } |
bb1cb422 L |
1761 | else |
1762 | { | |
1763 | /* A local symbol. */ | |
1764 | Elf_Internal_Sym *isym; | |
1765 | ||
1766 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1767 | abfd, r_symndx); | |
1768 | ||
1769 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
1770 | if (isym != NULL | |
82e96e07 | 1771 | && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
bb1cb422 | 1772 | { |
351f65ca | 1773 | h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, FALSE); |
bb1cb422 L |
1774 | if (h == NULL) |
1775 | abort (); | |
1776 | } | |
1777 | } | |
c434dee6 | 1778 | |
3db2e7dd L |
1779 | if (h) |
1780 | { | |
1781 | struct elf_x86_64_link_hash_entry *eh; | |
1782 | struct elf_dyn_relocs **pp; | |
1783 | struct elf_dyn_relocs *p; | |
1784 | ||
1785 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
1786 | ||
1787 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) | |
1788 | if (p->sec == sec) | |
1789 | { | |
1790 | /* Everything must go for SEC. */ | |
1791 | *pp = p->next; | |
1792 | break; | |
1793 | } | |
1794 | } | |
1795 | ||
351f65ca L |
1796 | r_type = ELF32_R_TYPE (rel->r_info); |
1797 | if (! elf_x86_64_tls_transition (info, abfd, sec, NULL, | |
1798 | symtab_hdr, sym_hashes, | |
1799 | &r_type, GOT_UNKNOWN, | |
1800 | rel, relend, h, r_symndx)) | |
142411ca L |
1801 | return FALSE; |
1802 | ||
26e41594 AM |
1803 | switch (r_type) |
1804 | { | |
1805 | case R_X86_64_TLSLD: | |
4dfe6ac6 NC |
1806 | if (htab->tls_ld_got.refcount > 0) |
1807 | htab->tls_ld_got.refcount -= 1; | |
26e41594 | 1808 | break; |
c434dee6 | 1809 | |
26e41594 | 1810 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
1811 | case R_X86_64_GOTPC32_TLSDESC: |
1812 | case R_X86_64_TLSDESC_CALL: | |
26e41594 AM |
1813 | case R_X86_64_GOTTPOFF: |
1814 | case R_X86_64_GOT32: | |
1815 | case R_X86_64_GOTPCREL: | |
7b81dfbb AJ |
1816 | case R_X86_64_GOT64: |
1817 | case R_X86_64_GOTPCREL64: | |
1818 | case R_X86_64_GOTPLT64: | |
26e41594 AM |
1819 | if (h != NULL) |
1820 | { | |
7b81dfbb AJ |
1821 | if (r_type == R_X86_64_GOTPLT64 && h->plt.refcount > 0) |
1822 | h->plt.refcount -= 1; | |
26e41594 AM |
1823 | if (h->got.refcount > 0) |
1824 | h->got.refcount -= 1; | |
bb1cb422 L |
1825 | if (h->type == STT_GNU_IFUNC) |
1826 | { | |
1827 | if (h->plt.refcount > 0) | |
1828 | h->plt.refcount -= 1; | |
1829 | } | |
26e41594 AM |
1830 | } |
1831 | else if (local_got_refcounts != NULL) | |
1832 | { | |
1833 | if (local_got_refcounts[r_symndx] > 0) | |
1834 | local_got_refcounts[r_symndx] -= 1; | |
1835 | } | |
1836 | break; | |
c434dee6 | 1837 | |
26e41594 AM |
1838 | case R_X86_64_8: |
1839 | case R_X86_64_16: | |
1840 | case R_X86_64_32: | |
1841 | case R_X86_64_64: | |
1842 | case R_X86_64_32S: | |
1843 | case R_X86_64_PC8: | |
1844 | case R_X86_64_PC16: | |
1845 | case R_X86_64_PC32: | |
d6ab8113 | 1846 | case R_X86_64_PC64: |
3db2e7dd L |
1847 | if (info->shared |
1848 | && (h == NULL || h->type != STT_GNU_IFUNC)) | |
26e41594 AM |
1849 | break; |
1850 | /* Fall thru */ | |
c434dee6 | 1851 | |
26e41594 | 1852 | case R_X86_64_PLT32: |
7b81dfbb | 1853 | case R_X86_64_PLTOFF64: |
26e41594 AM |
1854 | if (h != NULL) |
1855 | { | |
1856 | if (h->plt.refcount > 0) | |
1857 | h->plt.refcount -= 1; | |
1858 | } | |
1859 | break; | |
70256ad8 | 1860 | |
26e41594 AM |
1861 | default: |
1862 | break; | |
1863 | } | |
1864 | } | |
70256ad8 | 1865 | |
b34976b6 | 1866 | return TRUE; |
70256ad8 AJ |
1867 | } |
1868 | ||
1869 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
1870 | regular object. The current definition is in some section of the | |
1871 | dynamic object, but we're not including those sections. We have to | |
1872 | change the definition to something the rest of the link can | |
407443a3 | 1873 | understand. */ |
70256ad8 | 1874 | |
b34976b6 | 1875 | static bfd_boolean |
351f65ca L |
1876 | elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info, |
1877 | struct elf_link_hash_entry *h) | |
70256ad8 | 1878 | { |
351f65ca | 1879 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 | 1880 | asection *s; |
70256ad8 | 1881 | |
cbe950e9 L |
1882 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
1883 | if (h->type == STT_GNU_IFUNC) | |
1884 | { | |
1885 | if (h->plt.refcount <= 0) | |
1886 | { | |
1887 | h->plt.offset = (bfd_vma) -1; | |
1888 | h->needs_plt = 0; | |
1889 | } | |
1890 | return TRUE; | |
1891 | } | |
1892 | ||
70256ad8 AJ |
1893 | /* If this is a function, put it in the procedure linkage table. We |
1894 | will fill in the contents of the procedure linkage table later, | |
1895 | when we know the address of the .got section. */ | |
1896 | if (h->type == STT_FUNC | |
f5385ebf | 1897 | || h->needs_plt) |
70256ad8 | 1898 | { |
c434dee6 | 1899 | if (h->plt.refcount <= 0 |
27482721 AJ |
1900 | || SYMBOL_CALLS_LOCAL (info, h) |
1901 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1902 | && h->root.type == bfd_link_hash_undefweak)) | |
70256ad8 | 1903 | { |
70256ad8 AJ |
1904 | /* This case can occur if we saw a PLT32 reloc in an input |
1905 | file, but the symbol was never referred to by a dynamic | |
1906 | object, or if all references were garbage collected. In | |
1907 | such a case, we don't actually need to build a procedure | |
1908 | linkage table, and we can just do a PC32 reloc instead. */ | |
70256ad8 | 1909 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 1910 | h->needs_plt = 0; |
70256ad8 AJ |
1911 | } |
1912 | ||
b34976b6 | 1913 | return TRUE; |
70256ad8 | 1914 | } |
bbd7ec4a | 1915 | else |
c434dee6 AJ |
1916 | /* It's possible that we incorrectly decided a .plt reloc was |
1917 | needed for an R_X86_64_PC32 reloc to a non-function sym in | |
1918 | check_relocs. We can't decide accurately between function and | |
1919 | non-function syms in check-relocs; Objects loaded later in | |
1920 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 1921 | h->plt.offset = (bfd_vma) -1; |
70256ad8 AJ |
1922 | |
1923 | /* If this is a weak symbol, and there is a real definition, the | |
1924 | processor independent code will have arranged for us to see the | |
407443a3 | 1925 | real definition first, and we can just use the same value. */ |
f6e332e6 | 1926 | if (h->u.weakdef != NULL) |
70256ad8 | 1927 | { |
f6e332e6 AM |
1928 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
1929 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
1930 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
1931 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
d40d037c | 1932 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
f6e332e6 | 1933 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 1934 | return TRUE; |
70256ad8 AJ |
1935 | } |
1936 | ||
1937 | /* This is a reference to a symbol defined by a dynamic object which | |
407443a3 | 1938 | is not a function. */ |
70256ad8 AJ |
1939 | |
1940 | /* If we are creating a shared library, we must presume that the | |
1941 | only references to the symbol are via the global offset table. | |
1942 | For such cases we need not do anything here; the relocations will | |
407443a3 | 1943 | be handled correctly by relocate_section. */ |
70256ad8 | 1944 | if (info->shared) |
b34976b6 | 1945 | return TRUE; |
70256ad8 AJ |
1946 | |
1947 | /* If there are no references to this symbol that do not use the | |
1948 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 1949 | if (!h->non_got_ref) |
b34976b6 | 1950 | return TRUE; |
70256ad8 | 1951 | |
c434dee6 AJ |
1952 | /* If -z nocopyreloc was given, we won't generate them either. */ |
1953 | if (info->nocopyreloc) | |
1954 | { | |
f5385ebf | 1955 | h->non_got_ref = 0; |
b34976b6 | 1956 | return TRUE; |
c434dee6 AJ |
1957 | } |
1958 | ||
d40d037c | 1959 | if (ELIMINATE_COPY_RELOCS) |
c434dee6 | 1960 | { |
351f65ca | 1961 | struct elf_x86_64_link_hash_entry * eh; |
e03a8ed8 | 1962 | struct elf_dyn_relocs *p; |
c434dee6 | 1963 | |
351f65ca | 1964 | eh = (struct elf_x86_64_link_hash_entry *) h; |
d40d037c AJ |
1965 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
1966 | { | |
1967 | s = p->sec->output_section; | |
1968 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1969 | break; | |
1970 | } | |
1971 | ||
1972 | /* If we didn't find any dynamic relocs in read-only sections, then | |
1973 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
1974 | if (p == NULL) | |
1975 | { | |
f5385ebf | 1976 | h->non_got_ref = 0; |
d40d037c AJ |
1977 | return TRUE; |
1978 | } | |
c434dee6 AJ |
1979 | } |
1980 | ||
909272ee AM |
1981 | if (h->size == 0) |
1982 | { | |
1983 | (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), | |
1984 | h->root.root.string); | |
1985 | return TRUE; | |
1986 | } | |
1987 | ||
70256ad8 | 1988 | /* We must allocate the symbol in our .dynbss section, which will |
407443a3 | 1989 | become part of the .bss section of the executable. There will be |
70256ad8 AJ |
1990 | an entry for this symbol in the .dynsym section. The dynamic |
1991 | object will contain position independent code, so all references | |
1992 | from the dynamic object to this symbol will go through the global | |
1993 | offset table. The dynamic linker will use the .dynsym entry to | |
1994 | determine the address it must put in the global offset table, so | |
1995 | both the dynamic object and the regular object will refer to the | |
1996 | same memory location for the variable. */ | |
1997 | ||
351f65ca | 1998 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1999 | if (htab == NULL) |
2000 | return FALSE; | |
70256ad8 AJ |
2001 | |
2002 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker | |
2003 | to copy the initial value out of the dynamic object and into the | |
cedb70c5 | 2004 | runtime process image. */ |
70256ad8 AJ |
2005 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
2006 | { | |
351f65ca L |
2007 | const struct elf_backend_data *bed; |
2008 | bed = get_elf_backend_data (info->output_bfd); | |
2009 | htab->srelbss->size += bed->s->sizeof_rela; | |
f5385ebf | 2010 | h->needs_copy = 1; |
70256ad8 AJ |
2011 | } |
2012 | ||
c434dee6 | 2013 | s = htab->sdynbss; |
70256ad8 | 2014 | |
027297b7 | 2015 | return _bfd_elf_adjust_dynamic_copy (h, s); |
70256ad8 AJ |
2016 | } |
2017 | ||
c434dee6 AJ |
2018 | /* Allocate space in .plt, .got and associated reloc sections for |
2019 | dynamic relocs. */ | |
2020 | ||
b34976b6 | 2021 | static bfd_boolean |
351f65ca | 2022 | elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
2023 | { |
2024 | struct bfd_link_info *info; | |
351f65ca L |
2025 | struct elf_x86_64_link_hash_table *htab; |
2026 | struct elf_x86_64_link_hash_entry *eh; | |
e03a8ed8 | 2027 | struct elf_dyn_relocs *p; |
351f65ca | 2028 | const struct elf_backend_data *bed; |
c434dee6 | 2029 | |
e92d460e | 2030 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 2031 | return TRUE; |
c434dee6 | 2032 | |
e92d460e AM |
2033 | if (h->root.type == bfd_link_hash_warning) |
2034 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
351f65ca | 2035 | eh = (struct elf_x86_64_link_hash_entry *) h; |
e92d460e | 2036 | |
c434dee6 | 2037 | info = (struct bfd_link_info *) inf; |
351f65ca | 2038 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2039 | if (htab == NULL) |
2040 | return FALSE; | |
351f65ca | 2041 | bed = get_elf_backend_data (info->output_bfd); |
c434dee6 | 2042 | |
cbe950e9 L |
2043 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
2044 | here if it is defined and referenced in a non-shared object. */ | |
2045 | if (h->type == STT_GNU_IFUNC | |
2046 | && h->def_regular) | |
e03a8ed8 L |
2047 | return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, |
2048 | &eh->dyn_relocs, | |
2049 | PLT_ENTRY_SIZE, | |
2050 | GOT_ENTRY_SIZE); | |
cbe950e9 L |
2051 | else if (htab->elf.dynamic_sections_created |
2052 | && h->plt.refcount > 0) | |
c434dee6 AJ |
2053 | { |
2054 | /* Make sure this symbol is output as a dynamic symbol. | |
2055 | Undefined weak syms won't yet be marked as dynamic. */ | |
2056 | if (h->dynindx == -1 | |
f5385ebf | 2057 | && !h->forced_local) |
c434dee6 | 2058 | { |
c152c796 | 2059 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2060 | return FALSE; |
c434dee6 AJ |
2061 | } |
2062 | ||
27482721 AJ |
2063 | if (info->shared |
2064 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
c434dee6 | 2065 | { |
6de2ae4a | 2066 | asection *s = htab->elf.splt; |
c434dee6 AJ |
2067 | |
2068 | /* If this is the first .plt entry, make room for the special | |
2069 | first entry. */ | |
eea6121a AM |
2070 | if (s->size == 0) |
2071 | s->size += PLT_ENTRY_SIZE; | |
c434dee6 | 2072 | |
eea6121a | 2073 | h->plt.offset = s->size; |
c434dee6 AJ |
2074 | |
2075 | /* If this symbol is not defined in a regular file, and we are | |
2076 | not generating a shared library, then set the symbol to this | |
2077 | location in the .plt. This is required to make function | |
2078 | pointers compare as equal between the normal executable and | |
2079 | the shared library. */ | |
2080 | if (! info->shared | |
f5385ebf | 2081 | && !h->def_regular) |
c434dee6 AJ |
2082 | { |
2083 | h->root.u.def.section = s; | |
2084 | h->root.u.def.value = h->plt.offset; | |
2085 | } | |
2086 | ||
2087 | /* Make room for this entry. */ | |
eea6121a | 2088 | s->size += PLT_ENTRY_SIZE; |
c434dee6 AJ |
2089 | |
2090 | /* We also need to make an entry in the .got.plt section, which | |
2091 | will be placed in the .got section by the linker script. */ | |
6de2ae4a | 2092 | htab->elf.sgotplt->size += GOT_ENTRY_SIZE; |
c434dee6 AJ |
2093 | |
2094 | /* We also need to make an entry in the .rela.plt section. */ | |
351f65ca | 2095 | htab->elf.srelplt->size += bed->s->sizeof_rela; |
6de2ae4a | 2096 | htab->elf.srelplt->reloc_count++; |
c434dee6 AJ |
2097 | } |
2098 | else | |
2099 | { | |
2100 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 2101 | h->needs_plt = 0; |
c434dee6 AJ |
2102 | } |
2103 | } | |
2104 | else | |
2105 | { | |
2106 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 2107 | h->needs_plt = 0; |
c434dee6 AJ |
2108 | } |
2109 | ||
67a4f2b7 AO |
2110 | eh->tlsdesc_got = (bfd_vma) -1; |
2111 | ||
bffbf940 JJ |
2112 | /* If R_X86_64_GOTTPOFF symbol is now local to the binary, |
2113 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
2114 | if (h->got.refcount > 0 | |
1d85728f | 2115 | && info->executable |
bffbf940 | 2116 | && h->dynindx == -1 |
351f65ca | 2117 | && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE) |
d8045f23 NC |
2118 | { |
2119 | h->got.offset = (bfd_vma) -1; | |
2120 | } | |
bffbf940 | 2121 | else if (h->got.refcount > 0) |
c434dee6 AJ |
2122 | { |
2123 | asection *s; | |
b34976b6 | 2124 | bfd_boolean dyn; |
351f65ca | 2125 | int tls_type = elf_x86_64_hash_entry (h)->tls_type; |
c434dee6 AJ |
2126 | |
2127 | /* Make sure this symbol is output as a dynamic symbol. | |
2128 | Undefined weak syms won't yet be marked as dynamic. */ | |
2129 | if (h->dynindx == -1 | |
f5385ebf | 2130 | && !h->forced_local) |
c434dee6 | 2131 | { |
c152c796 | 2132 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2133 | return FALSE; |
c434dee6 AJ |
2134 | } |
2135 | ||
67a4f2b7 AO |
2136 | if (GOT_TLS_GDESC_P (tls_type)) |
2137 | { | |
6de2ae4a | 2138 | eh->tlsdesc_got = htab->elf.sgotplt->size |
351f65ca | 2139 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 2140 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
2141 | h->got.offset = (bfd_vma) -2; |
2142 | } | |
2143 | if (! GOT_TLS_GDESC_P (tls_type) | |
2144 | || GOT_TLS_GD_P (tls_type)) | |
2145 | { | |
6de2ae4a | 2146 | s = htab->elf.sgot; |
67a4f2b7 AO |
2147 | h->got.offset = s->size; |
2148 | s->size += GOT_ENTRY_SIZE; | |
2149 | if (GOT_TLS_GD_P (tls_type)) | |
2150 | s->size += GOT_ENTRY_SIZE; | |
2151 | } | |
c434dee6 | 2152 | dyn = htab->elf.dynamic_sections_created; |
bffbf940 JJ |
2153 | /* R_X86_64_TLSGD needs one dynamic relocation if local symbol |
2154 | and two if global. | |
2155 | R_X86_64_GOTTPOFF needs one dynamic relocation. */ | |
67a4f2b7 | 2156 | if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
bffbf940 | 2157 | || tls_type == GOT_TLS_IE) |
351f65ca | 2158 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 | 2159 | else if (GOT_TLS_GD_P (tls_type)) |
351f65ca | 2160 | htab->elf.srelgot->size += 2 * bed->s->sizeof_rela; |
67a4f2b7 AO |
2161 | else if (! GOT_TLS_GDESC_P (tls_type) |
2162 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2163 | || h->root.type != bfd_link_hash_undefweak) | |
27482721 AJ |
2164 | && (info->shared |
2165 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
351f65ca | 2166 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
2167 | if (GOT_TLS_GDESC_P (tls_type)) |
2168 | { | |
351f65ca | 2169 | htab->elf.srelplt->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
2170 | htab->tlsdesc_plt = (bfd_vma) -1; |
2171 | } | |
c434dee6 AJ |
2172 | } |
2173 | else | |
2174 | h->got.offset = (bfd_vma) -1; | |
2175 | ||
c434dee6 | 2176 | if (eh->dyn_relocs == NULL) |
b34976b6 | 2177 | return TRUE; |
c434dee6 AJ |
2178 | |
2179 | /* In the shared -Bsymbolic case, discard space allocated for | |
2180 | dynamic pc-relative relocs against symbols which turn out to be | |
2181 | defined in regular objects. For the normal shared case, discard | |
2182 | space for pc-relative relocs that have become local due to symbol | |
2183 | visibility changes. */ | |
2184 | ||
2185 | if (info->shared) | |
2186 | { | |
27482721 AJ |
2187 | /* Relocs that use pc_count are those that appear on a call |
2188 | insn, or certain REL relocs that can generated via assembly. | |
2189 | We want calls to protected symbols to resolve directly to the | |
2190 | function rather than going via the plt. If people want | |
2191 | function pointer comparisons to work as expected then they | |
2192 | should avoid writing weird assembly. */ | |
2193 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
c434dee6 | 2194 | { |
e03a8ed8 | 2195 | struct elf_dyn_relocs **pp; |
c434dee6 AJ |
2196 | |
2197 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2198 | { | |
2199 | p->count -= p->pc_count; | |
2200 | p->pc_count = 0; | |
2201 | if (p->count == 0) | |
2202 | *pp = p->next; | |
2203 | else | |
2204 | pp = &p->next; | |
2205 | } | |
2206 | } | |
4e795f50 AM |
2207 | |
2208 | /* Also discard relocs on undefined weak syms with non-default | |
2209 | visibility. */ | |
22d606e9 | 2210 | if (eh->dyn_relocs != NULL |
4e795f50 | 2211 | && h->root.type == bfd_link_hash_undefweak) |
22d606e9 AM |
2212 | { |
2213 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
2214 | eh->dyn_relocs = NULL; | |
2215 | ||
2216 | /* Make sure undefined weak symbols are output as a dynamic | |
2217 | symbol in PIEs. */ | |
2218 | else if (h->dynindx == -1 | |
d8045f23 NC |
2219 | && ! h->forced_local |
2220 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2221 | return FALSE; | |
22d606e9 | 2222 | } |
cbe950e9 | 2223 | |
d8045f23 | 2224 | } |
d40d037c | 2225 | else if (ELIMINATE_COPY_RELOCS) |
c434dee6 AJ |
2226 | { |
2227 | /* For the non-shared case, discard space for relocs against | |
2228 | symbols which turn out to need copy relocs or are not | |
2229 | dynamic. */ | |
2230 | ||
f5385ebf AM |
2231 | if (!h->non_got_ref |
2232 | && ((h->def_dynamic | |
2233 | && !h->def_regular) | |
c434dee6 AJ |
2234 | || (htab->elf.dynamic_sections_created |
2235 | && (h->root.type == bfd_link_hash_undefweak | |
2236 | || h->root.type == bfd_link_hash_undefined)))) | |
2237 | { | |
2238 | /* Make sure this symbol is output as a dynamic symbol. | |
2239 | Undefined weak syms won't yet be marked as dynamic. */ | |
2240 | if (h->dynindx == -1 | |
d8045f23 NC |
2241 | && ! h->forced_local |
2242 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2243 | return FALSE; | |
c434dee6 AJ |
2244 | |
2245 | /* If that succeeded, we know we'll be keeping all the | |
2246 | relocs. */ | |
2247 | if (h->dynindx != -1) | |
2248 | goto keep; | |
2249 | } | |
2250 | ||
2251 | eh->dyn_relocs = NULL; | |
2252 | ||
2253 | keep: ; | |
2254 | } | |
2255 | ||
2256 | /* Finally, allocate space. */ | |
2257 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
2258 | { | |
e7c33416 NC |
2259 | asection * sreloc; |
2260 | ||
cbe950e9 | 2261 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
2262 | |
2263 | BFD_ASSERT (sreloc != NULL); | |
2264 | ||
351f65ca | 2265 | sreloc->size += p->count * bed->s->sizeof_rela; |
c434dee6 AJ |
2266 | } |
2267 | ||
b34976b6 | 2268 | return TRUE; |
c434dee6 AJ |
2269 | } |
2270 | ||
c25bc9fc L |
2271 | /* Allocate space in .plt, .got and associated reloc sections for |
2272 | local dynamic relocs. */ | |
2273 | ||
2274 | static bfd_boolean | |
351f65ca | 2275 | elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf) |
c25bc9fc L |
2276 | { |
2277 | struct elf_link_hash_entry *h | |
2278 | = (struct elf_link_hash_entry *) *slot; | |
2279 | ||
2280 | if (h->type != STT_GNU_IFUNC | |
2281 | || !h->def_regular | |
2282 | || !h->ref_regular | |
2283 | || !h->forced_local | |
2284 | || h->root.type != bfd_link_hash_defined) | |
2285 | abort (); | |
2286 | ||
351f65ca | 2287 | return elf_x86_64_allocate_dynrelocs (h, inf); |
c25bc9fc L |
2288 | } |
2289 | ||
c434dee6 AJ |
2290 | /* Find any dynamic relocs that apply to read-only sections. */ |
2291 | ||
b34976b6 | 2292 | static bfd_boolean |
351f65ca L |
2293 | elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h, |
2294 | void * inf) | |
c434dee6 | 2295 | { |
351f65ca | 2296 | struct elf_x86_64_link_hash_entry *eh; |
e03a8ed8 | 2297 | struct elf_dyn_relocs *p; |
c434dee6 | 2298 | |
e92d460e AM |
2299 | if (h->root.type == bfd_link_hash_warning) |
2300 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2301 | ||
aa715242 L |
2302 | /* Skip local IFUNC symbols. */ |
2303 | if (h->forced_local && h->type == STT_GNU_IFUNC) | |
2304 | return TRUE; | |
2305 | ||
351f65ca | 2306 | eh = (struct elf_x86_64_link_hash_entry *) h; |
c434dee6 AJ |
2307 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
2308 | { | |
2309 | asection *s = p->sec->output_section; | |
2310 | ||
2311 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2312 | { | |
2313 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
2314 | ||
2315 | info->flags |= DF_TEXTREL; | |
2316 | ||
b70321a2 L |
2317 | if (info->warn_shared_textrel && info->shared) |
2318 | info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"), | |
2319 | p->sec->owner, h->root.root.string, | |
2320 | p->sec); | |
2321 | ||
c434dee6 | 2322 | /* Not an error, just cut short the traversal. */ |
b34976b6 | 2323 | return FALSE; |
c434dee6 AJ |
2324 | } |
2325 | } | |
b34976b6 | 2326 | return TRUE; |
c434dee6 AJ |
2327 | } |
2328 | ||
70256ad8 AJ |
2329 | /* Set the sizes of the dynamic sections. */ |
2330 | ||
b34976b6 | 2331 | static bfd_boolean |
351f65ca L |
2332 | elf_x86_64_size_dynamic_sections (bfd *output_bfd, |
2333 | struct bfd_link_info *info) | |
70256ad8 | 2334 | { |
351f65ca | 2335 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
2336 | bfd *dynobj; |
2337 | asection *s; | |
b34976b6 | 2338 | bfd_boolean relocs; |
c434dee6 | 2339 | bfd *ibfd; |
351f65ca | 2340 | const struct elf_backend_data *bed; |
70256ad8 | 2341 | |
351f65ca | 2342 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2343 | if (htab == NULL) |
2344 | return FALSE; | |
351f65ca | 2345 | bed = get_elf_backend_data (output_bfd); |
4dfe6ac6 | 2346 | |
c434dee6 AJ |
2347 | dynobj = htab->elf.dynobj; |
2348 | if (dynobj == NULL) | |
2349 | abort (); | |
70256ad8 | 2350 | |
c434dee6 | 2351 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
2352 | { |
2353 | /* Set the contents of the .interp section to the interpreter. */ | |
36af4a4e | 2354 | if (info->executable) |
70256ad8 AJ |
2355 | { |
2356 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
c434dee6 AJ |
2357 | if (s == NULL) |
2358 | abort (); | |
351f65ca L |
2359 | s->size = htab->dynamic_interpreter_size; |
2360 | s->contents = (unsigned char *) htab->dynamic_interpreter; | |
70256ad8 AJ |
2361 | } |
2362 | } | |
70256ad8 | 2363 | |
c434dee6 AJ |
2364 | /* Set up .got offsets for local syms, and space for local dynamic |
2365 | relocs. */ | |
2366 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
70256ad8 | 2367 | { |
c434dee6 AJ |
2368 | bfd_signed_vma *local_got; |
2369 | bfd_signed_vma *end_local_got; | |
bffbf940 | 2370 | char *local_tls_type; |
67a4f2b7 | 2371 | bfd_vma *local_tlsdesc_gotent; |
c434dee6 AJ |
2372 | bfd_size_type locsymcount; |
2373 | Elf_Internal_Shdr *symtab_hdr; | |
2374 | asection *srel; | |
70256ad8 | 2375 | |
0ffa91dd | 2376 | if (! is_x86_64_elf (ibfd)) |
70256ad8 AJ |
2377 | continue; |
2378 | ||
c434dee6 | 2379 | for (s = ibfd->sections; s != NULL; s = s->next) |
70256ad8 | 2380 | { |
e03a8ed8 | 2381 | struct elf_dyn_relocs *p; |
c434dee6 | 2382 | |
e03a8ed8 | 2383 | for (p = (struct elf_dyn_relocs *) |
e81d3500 | 2384 | (elf_section_data (s)->local_dynrel); |
c434dee6 AJ |
2385 | p != NULL; |
2386 | p = p->next) | |
70256ad8 | 2387 | { |
c434dee6 AJ |
2388 | if (!bfd_is_abs_section (p->sec) |
2389 | && bfd_is_abs_section (p->sec->output_section)) | |
2390 | { | |
2391 | /* Input section has been discarded, either because | |
2392 | it is a copy of a linkonce section or due to | |
2393 | linker script /DISCARD/, so we'll be discarding | |
2394 | the relocs too. */ | |
2395 | } | |
2396 | else if (p->count != 0) | |
2397 | { | |
2398 | srel = elf_section_data (p->sec)->sreloc; | |
351f65ca | 2399 | srel->size += p->count * bed->s->sizeof_rela; |
c434dee6 | 2400 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
b70321a2 L |
2401 | { |
2402 | info->flags |= DF_TEXTREL; | |
2403 | if (info->warn_shared_textrel && info->shared) | |
2404 | info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"), | |
2405 | p->sec->owner, p->sec); | |
2406 | break; | |
2407 | } | |
c434dee6 | 2408 | } |
70256ad8 AJ |
2409 | } |
2410 | } | |
c434dee6 AJ |
2411 | |
2412 | local_got = elf_local_got_refcounts (ibfd); | |
2413 | if (!local_got) | |
2414 | continue; | |
2415 | ||
0ffa91dd | 2416 | symtab_hdr = &elf_symtab_hdr (ibfd); |
c434dee6 AJ |
2417 | locsymcount = symtab_hdr->sh_info; |
2418 | end_local_got = local_got + locsymcount; | |
351f65ca L |
2419 | local_tls_type = elf_x86_64_local_got_tls_type (ibfd); |
2420 | local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd); | |
6de2ae4a L |
2421 | s = htab->elf.sgot; |
2422 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
2423 | for (; local_got < end_local_got; |
2424 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
70256ad8 | 2425 | { |
67a4f2b7 | 2426 | *local_tlsdesc_gotent = (bfd_vma) -1; |
c434dee6 | 2427 | if (*local_got > 0) |
70256ad8 | 2428 | { |
67a4f2b7 AO |
2429 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
2430 | { | |
6de2ae4a | 2431 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
351f65ca | 2432 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 2433 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
2434 | *local_got = (bfd_vma) -2; |
2435 | } | |
2436 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
2437 | || GOT_TLS_GD_P (*local_tls_type)) | |
2438 | { | |
2439 | *local_got = s->size; | |
2440 | s->size += GOT_ENTRY_SIZE; | |
2441 | if (GOT_TLS_GD_P (*local_tls_type)) | |
2442 | s->size += GOT_ENTRY_SIZE; | |
2443 | } | |
bffbf940 | 2444 | if (info->shared |
67a4f2b7 | 2445 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
bffbf940 | 2446 | || *local_tls_type == GOT_TLS_IE) |
67a4f2b7 AO |
2447 | { |
2448 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
2449 | { | |
6de2ae4a | 2450 | htab->elf.srelplt->size |
351f65ca | 2451 | += bed->s->sizeof_rela; |
67a4f2b7 AO |
2452 | htab->tlsdesc_plt = (bfd_vma) -1; |
2453 | } | |
2454 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
2455 | || GOT_TLS_GD_P (*local_tls_type)) | |
351f65ca | 2456 | srel->size += bed->s->sizeof_rela; |
67a4f2b7 | 2457 | } |
70256ad8 AJ |
2458 | } |
2459 | else | |
c434dee6 AJ |
2460 | *local_got = (bfd_vma) -1; |
2461 | } | |
2462 | } | |
70256ad8 | 2463 | |
bffbf940 JJ |
2464 | if (htab->tls_ld_got.refcount > 0) |
2465 | { | |
2466 | /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD | |
2467 | relocs. */ | |
6de2ae4a L |
2468 | htab->tls_ld_got.offset = htab->elf.sgot->size; |
2469 | htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; | |
351f65ca | 2470 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
bffbf940 JJ |
2471 | } |
2472 | else | |
2473 | htab->tls_ld_got.offset = -1; | |
2474 | ||
c434dee6 AJ |
2475 | /* Allocate global sym .plt and .got entries, and space for global |
2476 | sym dynamic relocs. */ | |
351f65ca | 2477 | elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs, |
eb4ff4d6 | 2478 | info); |
c434dee6 | 2479 | |
c25bc9fc L |
2480 | /* Allocate .plt and .got entries, and space for local symbols. */ |
2481 | htab_traverse (htab->loc_hash_table, | |
351f65ca | 2482 | elf_x86_64_allocate_local_dynrelocs, |
c25bc9fc L |
2483 | info); |
2484 | ||
67a4f2b7 AO |
2485 | /* For every jump slot reserved in the sgotplt, reloc_count is |
2486 | incremented. However, when we reserve space for TLS descriptors, | |
2487 | it's not incremented, so in order to compute the space reserved | |
2488 | for them, it suffices to multiply the reloc count by the jump | |
2489 | slot size. */ | |
6de2ae4a | 2490 | if (htab->elf.srelplt) |
67a4f2b7 | 2491 | htab->sgotplt_jump_table_size |
351f65ca | 2492 | = elf_x86_64_compute_jump_table_size (htab); |
67a4f2b7 AO |
2493 | |
2494 | if (htab->tlsdesc_plt) | |
2495 | { | |
2496 | /* If we're not using lazy TLS relocations, don't generate the | |
2497 | PLT and GOT entries they require. */ | |
2498 | if ((info->flags & DF_BIND_NOW)) | |
2499 | htab->tlsdesc_plt = 0; | |
2500 | else | |
2501 | { | |
6de2ae4a L |
2502 | htab->tlsdesc_got = htab->elf.sgot->size; |
2503 | htab->elf.sgot->size += GOT_ENTRY_SIZE; | |
67a4f2b7 AO |
2504 | /* Reserve room for the initial entry. |
2505 | FIXME: we could probably do away with it in this case. */ | |
6de2ae4a L |
2506 | if (htab->elf.splt->size == 0) |
2507 | htab->elf.splt->size += PLT_ENTRY_SIZE; | |
2508 | htab->tlsdesc_plt = htab->elf.splt->size; | |
2509 | htab->elf.splt->size += PLT_ENTRY_SIZE; | |
67a4f2b7 AO |
2510 | } |
2511 | } | |
2512 | ||
a7b16ceb L |
2513 | if (htab->elf.sgotplt) |
2514 | { | |
e28df02b L |
2515 | struct elf_link_hash_entry *got; |
2516 | got = elf_link_hash_lookup (elf_hash_table (info), | |
2517 | "_GLOBAL_OFFSET_TABLE_", | |
2518 | FALSE, FALSE, FALSE); | |
2519 | ||
a7b16ceb | 2520 | /* Don't allocate .got.plt section if there are no GOT nor PLT |
e28df02b L |
2521 | entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */ |
2522 | if ((got == NULL | |
2523 | || !got->ref_regular_nonweak) | |
2524 | && (htab->elf.sgotplt->size | |
2525 | == get_elf_backend_data (output_bfd)->got_header_size) | |
a7b16ceb L |
2526 | && (htab->elf.splt == NULL |
2527 | || htab->elf.splt->size == 0) | |
2528 | && (htab->elf.sgot == NULL | |
2529 | || htab->elf.sgot->size == 0) | |
2530 | && (htab->elf.iplt == NULL | |
2531 | || htab->elf.iplt->size == 0) | |
2532 | && (htab->elf.igotplt == NULL | |
2533 | || htab->elf.igotplt->size == 0)) | |
2534 | htab->elf.sgotplt->size = 0; | |
2535 | } | |
2536 | ||
c434dee6 AJ |
2537 | /* We now have determined the sizes of the various dynamic sections. |
2538 | Allocate memory for them. */ | |
b34976b6 | 2539 | relocs = FALSE; |
c434dee6 AJ |
2540 | for (s = dynobj->sections; s != NULL; s = s->next) |
2541 | { | |
2542 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
2543 | continue; | |
2544 | ||
6de2ae4a L |
2545 | if (s == htab->elf.splt |
2546 | || s == htab->elf.sgot | |
2547 | || s == htab->elf.sgotplt | |
2548 | || s == htab->elf.iplt | |
2549 | || s == htab->elf.igotplt | |
75ff4589 | 2550 | || s == htab->sdynbss) |
c434dee6 AJ |
2551 | { |
2552 | /* Strip this section if we don't need it; see the | |
2553 | comment below. */ | |
2554 | } | |
0112cd26 | 2555 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
c434dee6 | 2556 | { |
6de2ae4a | 2557 | if (s->size != 0 && s != htab->elf.srelplt) |
b34976b6 | 2558 | relocs = TRUE; |
c434dee6 AJ |
2559 | |
2560 | /* We use the reloc_count field as a counter if we need | |
2561 | to copy relocs into the output file. */ | |
6de2ae4a | 2562 | if (s != htab->elf.srelplt) |
67a4f2b7 | 2563 | s->reloc_count = 0; |
70256ad8 | 2564 | } |
c434dee6 | 2565 | else |
70256ad8 AJ |
2566 | { |
2567 | /* It's not one of our sections, so don't allocate space. */ | |
2568 | continue; | |
2569 | } | |
2570 | ||
eea6121a | 2571 | if (s->size == 0) |
70256ad8 | 2572 | { |
c434dee6 AJ |
2573 | /* If we don't need this section, strip it from the |
2574 | output file. This is mostly to handle .rela.bss and | |
2575 | .rela.plt. We must create both sections in | |
2576 | create_dynamic_sections, because they must be created | |
2577 | before the linker maps input sections to output | |
2578 | sections. The linker does that before | |
2579 | adjust_dynamic_symbol is called, and it is that | |
2580 | function which decides whether anything needs to go | |
2581 | into these sections. */ | |
2582 | ||
8423293d | 2583 | s->flags |= SEC_EXCLUDE; |
70256ad8 AJ |
2584 | continue; |
2585 | } | |
2586 | ||
c456f082 AM |
2587 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
2588 | continue; | |
2589 | ||
70256ad8 AJ |
2590 | /* Allocate memory for the section contents. We use bfd_zalloc |
2591 | here in case unused entries are not reclaimed before the | |
2592 | section's contents are written out. This should not happen, | |
2593 | but this way if it does, we get a R_X86_64_NONE reloc instead | |
2594 | of garbage. */ | |
eea6121a | 2595 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c434dee6 | 2596 | if (s->contents == NULL) |
b34976b6 | 2597 | return FALSE; |
70256ad8 AJ |
2598 | } |
2599 | ||
c434dee6 | 2600 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
2601 | { |
2602 | /* Add some entries to the .dynamic section. We fill in the | |
351f65ca | 2603 | values later, in elf_x86_64_finish_dynamic_sections, but we |
70256ad8 | 2604 | must add the entries now so that we get the correct size for |
407443a3 | 2605 | the .dynamic section. The DT_DEBUG entry is filled in by the |
70256ad8 | 2606 | dynamic linker and used by the debugger. */ |
dc810e39 | 2607 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 2608 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 2609 | |
36af4a4e | 2610 | if (info->executable) |
70256ad8 | 2611 | { |
dc810e39 | 2612 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 2613 | return FALSE; |
70256ad8 AJ |
2614 | } |
2615 | ||
6de2ae4a | 2616 | if (htab->elf.splt->size != 0) |
70256ad8 | 2617 | { |
dc810e39 AM |
2618 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
2619 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
2620 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
2621 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 2622 | return FALSE; |
67a4f2b7 AO |
2623 | |
2624 | if (htab->tlsdesc_plt | |
2625 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
2626 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
2627 | return FALSE; | |
70256ad8 AJ |
2628 | } |
2629 | ||
2630 | if (relocs) | |
2631 | { | |
dc810e39 AM |
2632 | if (!add_dynamic_entry (DT_RELA, 0) |
2633 | || !add_dynamic_entry (DT_RELASZ, 0) | |
351f65ca | 2634 | || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela)) |
b34976b6 | 2635 | return FALSE; |
70256ad8 | 2636 | |
c434dee6 AJ |
2637 | /* If any dynamic relocs apply to a read-only section, |
2638 | then we need a DT_TEXTREL entry. */ | |
2639 | if ((info->flags & DF_TEXTREL) == 0) | |
eb4ff4d6 | 2640 | elf_link_hash_traverse (&htab->elf, |
351f65ca | 2641 | elf_x86_64_readonly_dynrelocs, |
eb4ff4d6 | 2642 | info); |
c434dee6 AJ |
2643 | |
2644 | if ((info->flags & DF_TEXTREL) != 0) | |
2645 | { | |
2646 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 2647 | return FALSE; |
c434dee6 | 2648 | } |
70256ad8 AJ |
2649 | } |
2650 | } | |
dc810e39 | 2651 | #undef add_dynamic_entry |
70256ad8 | 2652 | |
b34976b6 | 2653 | return TRUE; |
70256ad8 AJ |
2654 | } |
2655 | ||
67a4f2b7 | 2656 | static bfd_boolean |
351f65ca L |
2657 | elf_x86_64_always_size_sections (bfd *output_bfd, |
2658 | struct bfd_link_info *info) | |
67a4f2b7 AO |
2659 | { |
2660 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
2661 | ||
2662 | if (tls_sec) | |
2663 | { | |
2664 | struct elf_link_hash_entry *tlsbase; | |
2665 | ||
2666 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
2667 | "_TLS_MODULE_BASE_", | |
2668 | FALSE, FALSE, FALSE); | |
2669 | ||
2670 | if (tlsbase && tlsbase->type == STT_TLS) | |
2671 | { | |
351f65ca | 2672 | struct elf_x86_64_link_hash_table *htab; |
67a4f2b7 AO |
2673 | struct bfd_link_hash_entry *bh = NULL; |
2674 | const struct elf_backend_data *bed | |
2675 | = get_elf_backend_data (output_bfd); | |
2676 | ||
351f65ca | 2677 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2678 | if (htab == NULL) |
2679 | return FALSE; | |
2680 | ||
67a4f2b7 AO |
2681 | if (!(_bfd_generic_link_add_one_symbol |
2682 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
2683 | tls_sec, 0, NULL, FALSE, | |
2684 | bed->collect, &bh))) | |
2685 | return FALSE; | |
9f03412a | 2686 | |
4dfe6ac6 | 2687 | htab->tls_module_base = bh; |
9f03412a | 2688 | |
67a4f2b7 AO |
2689 | tlsbase = (struct elf_link_hash_entry *)bh; |
2690 | tlsbase->def_regular = 1; | |
2691 | tlsbase->other = STV_HIDDEN; | |
2692 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); | |
2693 | } | |
2694 | } | |
2695 | ||
2696 | return TRUE; | |
2697 | } | |
2698 | ||
9f03412a AO |
2699 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
2700 | executables. Rather than setting it to the beginning of the TLS | |
2701 | section, we have to set it to the end. This function may be called | |
2702 | multiple times, it is idempotent. */ | |
2703 | ||
2704 | static void | |
351f65ca | 2705 | elf_x86_64_set_tls_module_base (struct bfd_link_info *info) |
9f03412a | 2706 | { |
351f65ca | 2707 | struct elf_x86_64_link_hash_table *htab; |
9f03412a AO |
2708 | struct bfd_link_hash_entry *base; |
2709 | ||
2710 | if (!info->executable) | |
2711 | return; | |
2712 | ||
351f65ca | 2713 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2714 | if (htab == NULL) |
2715 | return; | |
9f03412a | 2716 | |
4dfe6ac6 NC |
2717 | base = htab->tls_module_base; |
2718 | if (base == NULL) | |
9f03412a AO |
2719 | return; |
2720 | ||
4dfe6ac6 | 2721 | base->u.def.value = htab->elf.tls_size; |
9f03412a AO |
2722 | } |
2723 | ||
bffbf940 JJ |
2724 | /* Return the base VMA address which should be subtracted from real addresses |
2725 | when resolving @dtpoff relocation. | |
2726 | This is PT_TLS segment p_vaddr. */ | |
2727 | ||
2728 | static bfd_vma | |
351f65ca | 2729 | elf_x86_64_dtpoff_base (struct bfd_link_info *info) |
bffbf940 | 2730 | { |
e1918d23 AM |
2731 | /* If tls_sec is NULL, we should have signalled an error already. */ |
2732 | if (elf_hash_table (info)->tls_sec == NULL) | |
bffbf940 | 2733 | return 0; |
e1918d23 | 2734 | return elf_hash_table (info)->tls_sec->vma; |
bffbf940 JJ |
2735 | } |
2736 | ||
2737 | /* Return the relocation value for @tpoff relocation | |
2738 | if STT_TLS virtual address is ADDRESS. */ | |
2739 | ||
2740 | static bfd_vma | |
351f65ca | 2741 | elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 2742 | { |
e1918d23 | 2743 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
2744 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
2745 | bfd_vma static_tls_size; | |
bffbf940 JJ |
2746 | |
2747 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 2748 | if (htab->tls_sec == NULL) |
bffbf940 | 2749 | return 0; |
7dc98aea RO |
2750 | |
2751 | /* Consider special static TLS alignment requirements. */ | |
2752 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
2753 | return address - static_tls_size - htab->tls_sec->vma; | |
bffbf940 JJ |
2754 | } |
2755 | ||
90f487df L |
2756 | /* Is the instruction before OFFSET in CONTENTS a 32bit relative |
2757 | branch? */ | |
2758 | ||
2759 | static bfd_boolean | |
2760 | is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset) | |
2761 | { | |
2762 | /* Opcode Instruction | |
2763 | 0xe8 call | |
2764 | 0xe9 jump | |
2765 | 0x0f 0x8x conditional jump */ | |
2766 | return ((offset > 0 | |
2767 | && (contents [offset - 1] == 0xe8 | |
2768 | || contents [offset - 1] == 0xe9)) | |
2769 | || (offset > 1 | |
2770 | && contents [offset - 2] == 0x0f | |
2771 | && (contents [offset - 1] & 0xf0) == 0x80)); | |
2772 | } | |
2773 | ||
8d88c4ca NC |
2774 | /* Relocate an x86_64 ELF section. */ |
2775 | ||
b34976b6 | 2776 | static bfd_boolean |
351f65ca L |
2777 | elf_x86_64_relocate_section (bfd *output_bfd, |
2778 | struct bfd_link_info *info, | |
2779 | bfd *input_bfd, | |
2780 | asection *input_section, | |
2781 | bfd_byte *contents, | |
2782 | Elf_Internal_Rela *relocs, | |
2783 | Elf_Internal_Sym *local_syms, | |
2784 | asection **local_sections) | |
8d88c4ca | 2785 | { |
351f65ca | 2786 | struct elf_x86_64_link_hash_table *htab; |
8d88c4ca NC |
2787 | Elf_Internal_Shdr *symtab_hdr; |
2788 | struct elf_link_hash_entry **sym_hashes; | |
2789 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 2790 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 2791 | Elf_Internal_Rela *rel; |
8d88c4ca NC |
2792 | Elf_Internal_Rela *relend; |
2793 | ||
0ffa91dd NC |
2794 | BFD_ASSERT (is_x86_64_elf (input_bfd)); |
2795 | ||
351f65ca | 2796 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2797 | if (htab == NULL) |
2798 | return FALSE; | |
0ffa91dd | 2799 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
2800 | sym_hashes = elf_sym_hashes (input_bfd); |
2801 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
351f65ca | 2802 | local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 2803 | |
351f65ca | 2804 | elf_x86_64_set_tls_module_base (info); |
9f03412a | 2805 | |
c434dee6 | 2806 | rel = relocs; |
8d88c4ca | 2807 | relend = relocs + input_section->reloc_count; |
c434dee6 | 2808 | for (; rel < relend; rel++) |
8d88c4ca | 2809 | { |
bffbf940 | 2810 | unsigned int r_type; |
8d88c4ca NC |
2811 | reloc_howto_type *howto; |
2812 | unsigned long r_symndx; | |
2813 | struct elf_link_hash_entry *h; | |
2814 | Elf_Internal_Sym *sym; | |
2815 | asection *sec; | |
67a4f2b7 | 2816 | bfd_vma off, offplt; |
8d88c4ca | 2817 | bfd_vma relocation; |
b34976b6 | 2818 | bfd_boolean unresolved_reloc; |
8d88c4ca | 2819 | bfd_reloc_status_type r; |
bffbf940 | 2820 | int tls_type; |
cbe950e9 | 2821 | asection *base_got; |
8d88c4ca | 2822 | |
351f65ca | 2823 | r_type = ELF32_R_TYPE (rel->r_info); |
fe4770f4 AJ |
2824 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
2825 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
2826 | continue; | |
8d88c4ca | 2827 | |
bffbf940 | 2828 | if (r_type >= R_X86_64_max) |
8da6118f KH |
2829 | { |
2830 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2831 | return FALSE; |
8da6118f | 2832 | } |
8d88c4ca | 2833 | |
b491616a | 2834 | howto = x86_64_elf_howto_table + r_type; |
351f65ca | 2835 | r_symndx = htab->r_sym (rel->r_info); |
8d88c4ca NC |
2836 | h = NULL; |
2837 | sym = NULL; | |
2838 | sec = NULL; | |
b34976b6 | 2839 | unresolved_reloc = FALSE; |
8d88c4ca | 2840 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
2841 | { |
2842 | sym = local_syms + r_symndx; | |
2843 | sec = local_sections[r_symndx]; | |
c434dee6 | 2844 | |
c25bc9fc L |
2845 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
2846 | &sec, rel); | |
2847 | ||
2848 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
1f85278f | 2849 | if (!info->relocatable |
351f65ca | 2850 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 2851 | { |
351f65ca L |
2852 | h = elf_x86_64_get_local_sym_hash (htab, input_bfd, |
2853 | rel, FALSE); | |
c25bc9fc L |
2854 | if (h == NULL) |
2855 | abort (); | |
2856 | ||
2857 | /* Set STT_GNU_IFUNC symbol value. */ | |
2858 | h->root.u.def.value = sym->st_value; | |
2859 | h->root.u.def.section = sec; | |
2860 | } | |
8da6118f | 2861 | } |
8d88c4ca | 2862 | else |
8da6118f | 2863 | { |
c9736ba0 | 2864 | bfd_boolean warned ATTRIBUTE_UNUSED; |
c434dee6 | 2865 | |
b2a8e766 AM |
2866 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2867 | r_symndx, symtab_hdr, sym_hashes, | |
2868 | h, sec, relocation, | |
2869 | unresolved_reloc, warned); | |
8da6118f | 2870 | } |
ab96bf03 AM |
2871 | |
2872 | if (sec != NULL && elf_discarded_section (sec)) | |
0672748a L |
2873 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
2874 | rel, relend, howto, contents); | |
ab96bf03 AM |
2875 | |
2876 | if (info->relocatable) | |
2877 | continue; | |
2878 | ||
cbe950e9 L |
2879 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
2880 | it here if it is defined in a non-shared object. */ | |
2881 | if (h != NULL | |
2882 | && h->type == STT_GNU_IFUNC | |
2883 | && h->def_regular) | |
2884 | { | |
2885 | asection *plt; | |
2886 | bfd_vma plt_index; | |
4c544807 | 2887 | const char *name; |
cbe950e9 L |
2888 | |
2889 | if ((input_section->flags & SEC_ALLOC) == 0 | |
2890 | || h->plt.offset == (bfd_vma) -1) | |
2891 | abort (); | |
2892 | ||
2893 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
6de2ae4a | 2894 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
cbe950e9 L |
2895 | relocation = (plt->output_section->vma |
2896 | + plt->output_offset + h->plt.offset); | |
2897 | ||
2898 | switch (r_type) | |
2899 | { | |
2900 | default: | |
4c544807 L |
2901 | if (h->root.root.string) |
2902 | name = h->root.root.string; | |
2903 | else | |
2904 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
2905 | NULL); | |
cbe950e9 L |
2906 | (*_bfd_error_handler) |
2907 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
2908 | "symbol `%s' isn't handled by %s"), input_bfd, | |
2909 | x86_64_elf_howto_table[r_type].name, | |
4c544807 | 2910 | name, __FUNCTION__); |
cbe950e9 L |
2911 | bfd_set_error (bfd_error_bad_value); |
2912 | return FALSE; | |
2913 | ||
2914 | case R_X86_64_32S: | |
710ab287 | 2915 | if (info->shared) |
cbe950e9 | 2916 | abort (); |
710ab287 L |
2917 | goto do_relocation; |
2918 | ||
248775ba L |
2919 | case R_X86_64_32: |
2920 | if (ABI_64_P (output_bfd)) | |
2921 | goto do_relocation; | |
17672001 | 2922 | /* FALLTHROUGH */ |
710ab287 L |
2923 | case R_X86_64_64: |
2924 | if (rel->r_addend != 0) | |
2925 | { | |
4c544807 L |
2926 | if (h->root.root.string) |
2927 | name = h->root.root.string; | |
2928 | else | |
2929 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
2930 | sym, NULL); | |
710ab287 L |
2931 | (*_bfd_error_handler) |
2932 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
2933 | "symbol `%s' has non-zero addend: %d"), | |
2934 | input_bfd, x86_64_elf_howto_table[r_type].name, | |
4c544807 | 2935 | name, rel->r_addend); |
710ab287 L |
2936 | bfd_set_error (bfd_error_bad_value); |
2937 | return FALSE; | |
2938 | } | |
2939 | ||
2940 | /* Generate dynamic relcoation only when there is a | |
2941 | non-GOF reference in a shared object. */ | |
2942 | if (info->shared && h->non_got_ref) | |
2943 | { | |
2944 | Elf_Internal_Rela outrel; | |
710ab287 L |
2945 | asection *sreloc; |
2946 | ||
c25bc9fc L |
2947 | /* Need a dynamic relocation to get the real function |
2948 | address. */ | |
710ab287 L |
2949 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
2950 | info, | |
2951 | input_section, | |
2952 | rel->r_offset); | |
2953 | if (outrel.r_offset == (bfd_vma) -1 | |
2954 | || outrel.r_offset == (bfd_vma) -2) | |
2955 | abort (); | |
2956 | ||
2957 | outrel.r_offset += (input_section->output_section->vma | |
2958 | + input_section->output_offset); | |
2959 | ||
2960 | if (h->dynindx == -1 | |
44c4ea11 L |
2961 | || h->forced_local |
2962 | || info->executable) | |
710ab287 L |
2963 | { |
2964 | /* This symbol is resolved locally. */ | |
351f65ca | 2965 | outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
710ab287 L |
2966 | outrel.r_addend = (h->root.u.def.value |
2967 | + h->root.u.def.section->output_section->vma | |
2968 | + h->root.u.def.section->output_offset); | |
2969 | } | |
2970 | else | |
2971 | { | |
351f65ca | 2972 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
710ab287 L |
2973 | outrel.r_addend = 0; |
2974 | } | |
2975 | ||
6de2ae4a | 2976 | sreloc = htab->elf.irelifunc; |
351f65ca | 2977 | elf_append_rela (output_bfd, sreloc, &outrel); |
710ab287 L |
2978 | |
2979 | /* If this reloc is against an external symbol, we | |
2980 | do not want to fiddle with the addend. Otherwise, | |
2981 | we need to include the symbol value so that it | |
2982 | becomes an addend for the dynamic reloc. For an | |
2983 | internal symbol, we have updated addend. */ | |
2984 | continue; | |
2985 | } | |
17672001 | 2986 | /* FALLTHROUGH */ |
cbe950e9 L |
2987 | case R_X86_64_PC32: |
2988 | case R_X86_64_PC64: | |
2989 | case R_X86_64_PLT32: | |
2990 | goto do_relocation; | |
2991 | ||
2992 | case R_X86_64_GOTPCREL: | |
2993 | case R_X86_64_GOTPCREL64: | |
6de2ae4a | 2994 | base_got = htab->elf.sgot; |
cbe950e9 L |
2995 | off = h->got.offset; |
2996 | ||
7afd84dc | 2997 | if (base_got == NULL) |
cbe950e9 L |
2998 | abort (); |
2999 | ||
7afd84dc | 3000 | if (off == (bfd_vma) -1) |
cbe950e9 | 3001 | { |
7afd84dc L |
3002 | /* We can't use h->got.offset here to save state, or |
3003 | even just remember the offset, as finish_dynamic_symbol | |
3004 | would use that as offset into .got. */ | |
cbe950e9 | 3005 | |
6de2ae4a | 3006 | if (htab->elf.splt != NULL) |
7afd84dc L |
3007 | { |
3008 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
3009 | off = (plt_index + 3) * GOT_ENTRY_SIZE; | |
6de2ae4a | 3010 | base_got = htab->elf.sgotplt; |
7afd84dc | 3011 | } |
cbe950e9 L |
3012 | else |
3013 | { | |
7afd84dc L |
3014 | plt_index = h->plt.offset / PLT_ENTRY_SIZE; |
3015 | off = plt_index * GOT_ENTRY_SIZE; | |
6de2ae4a | 3016 | base_got = htab->elf.igotplt; |
7afd84dc L |
3017 | } |
3018 | ||
3019 | if (h->dynindx == -1 | |
3020 | || h->forced_local | |
3021 | || info->symbolic) | |
3022 | { | |
3023 | /* This references the local defitionion. We must | |
3024 | initialize this entry in the global offset table. | |
3025 | Since the offset must always be a multiple of 8, | |
3026 | we use the least significant bit to record | |
3027 | whether we have initialized it already. | |
3028 | ||
3029 | When doing a dynamic link, we create a .rela.got | |
3030 | relocation entry to initialize the value. This | |
3031 | is done in the finish_dynamic_symbol routine. */ | |
3032 | if ((off & 1) != 0) | |
3033 | off &= ~1; | |
3034 | else | |
3035 | { | |
3036 | bfd_put_64 (output_bfd, relocation, | |
3037 | base_got->contents + off); | |
3038 | /* Note that this is harmless for the GOTPLT64 | |
3039 | case, as -1 | 1 still is -1. */ | |
3040 | h->got.offset |= 1; | |
3041 | } | |
cbe950e9 L |
3042 | } |
3043 | } | |
3044 | ||
3045 | relocation = (base_got->output_section->vma | |
3046 | + base_got->output_offset + off); | |
3047 | ||
cbe950e9 L |
3048 | goto do_relocation; |
3049 | } | |
3050 | } | |
3051 | ||
70256ad8 AJ |
3052 | /* When generating a shared object, the relocations handled here are |
3053 | copied into the output file to be resolved at run time. */ | |
3054 | switch (r_type) | |
3055 | { | |
3056 | case R_X86_64_GOT32: | |
7b81dfbb | 3057 | case R_X86_64_GOT64: |
70256ad8 AJ |
3058 | /* Relocation is to the entry for this symbol in the global |
3059 | offset table. */ | |
70256ad8 | 3060 | case R_X86_64_GOTPCREL: |
7b81dfbb AJ |
3061 | case R_X86_64_GOTPCREL64: |
3062 | /* Use global offset table entry as symbol value. */ | |
3063 | case R_X86_64_GOTPLT64: | |
3064 | /* This is the same as GOT64 for relocation purposes, but | |
3065 | indicates the existence of a PLT entry. The difficulty is, | |
3066 | that we must calculate the GOT slot offset from the PLT | |
3067 | offset, if this symbol got a PLT entry (it was global). | |
3068 | Additionally if it's computed from the PLT entry, then that | |
3069 | GOT offset is relative to .got.plt, not to .got. */ | |
6de2ae4a | 3070 | base_got = htab->elf.sgot; |
7b81dfbb | 3071 | |
6de2ae4a | 3072 | if (htab->elf.sgot == NULL) |
c434dee6 | 3073 | abort (); |
053579d7 | 3074 | |
51e0a107 | 3075 | if (h != NULL) |
70256ad8 | 3076 | { |
b34976b6 | 3077 | bfd_boolean dyn; |
c434dee6 AJ |
3078 | |
3079 | off = h->got.offset; | |
7b81dfbb AJ |
3080 | if (h->needs_plt |
3081 | && h->plt.offset != (bfd_vma)-1 | |
3082 | && off == (bfd_vma)-1) | |
3083 | { | |
3084 | /* We can't use h->got.offset here to save | |
3085 | state, or even just remember the offset, as | |
3086 | finish_dynamic_symbol would use that as offset into | |
3087 | .got. */ | |
3088 | bfd_vma plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
3089 | off = (plt_index + 3) * GOT_ENTRY_SIZE; | |
6de2ae4a | 3090 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
3091 | } |
3092 | ||
c434dee6 | 3093 | dyn = htab->elf.dynamic_sections_created; |
51e0a107 | 3094 | |
27482721 | 3095 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
51e0a107 | 3096 | || (info->shared |
27482721 | 3097 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
4bc6e03a AJ |
3098 | || (ELF_ST_VISIBILITY (h->other) |
3099 | && h->root.type == bfd_link_hash_undefweak)) | |
51e0a107 JH |
3100 | { |
3101 | /* This is actually a static link, or it is a -Bsymbolic | |
3102 | link and the symbol is defined locally, or the symbol | |
407443a3 | 3103 | was forced to be local because of a version file. We |
51e0a107 JH |
3104 | must initialize this entry in the global offset table. |
3105 | Since the offset must always be a multiple of 8, we | |
3106 | use the least significant bit to record whether we | |
3107 | have initialized it already. | |
3108 | ||
3109 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
3110 | relocation entry to initialize the value. This is |
3111 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
3112 | if ((off & 1) != 0) |
3113 | off &= ~1; | |
3114 | else | |
3115 | { | |
3116 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
3117 | base_got->contents + off); |
3118 | /* Note that this is harmless for the GOTPLT64 case, | |
3119 | as -1 | 1 still is -1. */ | |
51e0a107 JH |
3120 | h->got.offset |= 1; |
3121 | } | |
3122 | } | |
053579d7 | 3123 | else |
b34976b6 | 3124 | unresolved_reloc = FALSE; |
70256ad8 | 3125 | } |
51e0a107 JH |
3126 | else |
3127 | { | |
c434dee6 AJ |
3128 | if (local_got_offsets == NULL) |
3129 | abort (); | |
51e0a107 JH |
3130 | |
3131 | off = local_got_offsets[r_symndx]; | |
3132 | ||
3133 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
3134 | the least significant bit to record whether we have |
3135 | already generated the necessary reloc. */ | |
51e0a107 JH |
3136 | if ((off & 1) != 0) |
3137 | off &= ~1; | |
3138 | else | |
3139 | { | |
c434dee6 | 3140 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 3141 | base_got->contents + off); |
51e0a107 JH |
3142 | |
3143 | if (info->shared) | |
3144 | { | |
947216bf | 3145 | asection *s; |
51e0a107 | 3146 | Elf_Internal_Rela outrel; |
70256ad8 | 3147 | |
51e0a107 JH |
3148 | /* We need to generate a R_X86_64_RELATIVE reloc |
3149 | for the dynamic linker. */ | |
6de2ae4a | 3150 | s = htab->elf.srelgot; |
947216bf | 3151 | if (s == NULL) |
c434dee6 | 3152 | abort (); |
51e0a107 | 3153 | |
7b81dfbb AJ |
3154 | outrel.r_offset = (base_got->output_section->vma |
3155 | + base_got->output_offset | |
51e0a107 | 3156 | + off); |
351f65ca | 3157 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
51e0a107 | 3158 | outrel.r_addend = relocation; |
351f65ca | 3159 | elf_append_rela (output_bfd, s, &outrel); |
51e0a107 JH |
3160 | } |
3161 | ||
3162 | local_got_offsets[r_symndx] |= 1; | |
3163 | } | |
51e0a107 | 3164 | } |
6a2bda3f | 3165 | |
c434dee6 AJ |
3166 | if (off >= (bfd_vma) -2) |
3167 | abort (); | |
3168 | ||
7b81dfbb AJ |
3169 | relocation = base_got->output_section->vma |
3170 | + base_got->output_offset + off; | |
3171 | if (r_type != R_X86_64_GOTPCREL && r_type != R_X86_64_GOTPCREL64) | |
6de2ae4a L |
3172 | relocation -= htab->elf.sgotplt->output_section->vma |
3173 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 3174 | |
70256ad8 AJ |
3175 | break; |
3176 | ||
d6ab8113 JB |
3177 | case R_X86_64_GOTOFF64: |
3178 | /* Relocation is relative to the start of the global offset | |
3179 | table. */ | |
3180 | ||
3181 | /* Check to make sure it isn't a protected function symbol | |
3182 | for shared library since it may not be local when used | |
3183 | as function address. */ | |
3184 | if (info->shared | |
3185 | && h | |
3186 | && h->def_regular | |
3187 | && h->type == STT_FUNC | |
3188 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
3189 | { | |
3190 | (*_bfd_error_handler) | |
3191 | (_("%B: relocation R_X86_64_GOTOFF64 against protected function `%s' can not be used when making a shared object"), | |
3192 | input_bfd, h->root.root.string); | |
3193 | bfd_set_error (bfd_error_bad_value); | |
3194 | return FALSE; | |
3195 | } | |
3196 | ||
3197 | /* Note that sgot is not involved in this | |
3198 | calculation. We always want the start of .got.plt. If we | |
3199 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
3200 | permitted by the ABI, we might have to change this | |
3201 | calculation. */ | |
6de2ae4a L |
3202 | relocation -= htab->elf.sgotplt->output_section->vma |
3203 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
3204 | break; |
3205 | ||
3206 | case R_X86_64_GOTPC32: | |
7b81dfbb | 3207 | case R_X86_64_GOTPC64: |
d6ab8113 | 3208 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
3209 | relocation = htab->elf.sgotplt->output_section->vma |
3210 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
3211 | unresolved_reloc = FALSE; |
3212 | break; | |
7b81dfbb AJ |
3213 | |
3214 | case R_X86_64_PLTOFF64: | |
3215 | /* Relocation is PLT entry relative to GOT. For local | |
3216 | symbols it's the symbol itself relative to GOT. */ | |
3217 | if (h != NULL | |
3218 | /* See PLT32 handling. */ | |
3219 | && h->plt.offset != (bfd_vma) -1 | |
6de2ae4a | 3220 | && htab->elf.splt != NULL) |
7b81dfbb | 3221 | { |
6de2ae4a L |
3222 | relocation = (htab->elf.splt->output_section->vma |
3223 | + htab->elf.splt->output_offset | |
7b81dfbb AJ |
3224 | + h->plt.offset); |
3225 | unresolved_reloc = FALSE; | |
3226 | } | |
3227 | ||
6de2ae4a L |
3228 | relocation -= htab->elf.sgotplt->output_section->vma |
3229 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 3230 | break; |
d6ab8113 | 3231 | |
70256ad8 AJ |
3232 | case R_X86_64_PLT32: |
3233 | /* Relocation is to the entry for this symbol in the | |
3234 | procedure linkage table. */ | |
3235 | ||
3236 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 3237 | without using the procedure linkage table. */ |
70256ad8 AJ |
3238 | if (h == NULL) |
3239 | break; | |
3240 | ||
c434dee6 | 3241 | if (h->plt.offset == (bfd_vma) -1 |
6de2ae4a | 3242 | || htab->elf.splt == NULL) |
70256ad8 AJ |
3243 | { |
3244 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
3245 | happens when statically linking PIC code, or when |
3246 | using -Bsymbolic. */ | |
70256ad8 AJ |
3247 | break; |
3248 | } | |
3249 | ||
6de2ae4a L |
3250 | relocation = (htab->elf.splt->output_section->vma |
3251 | + htab->elf.splt->output_offset | |
70256ad8 | 3252 | + h->plt.offset); |
b34976b6 | 3253 | unresolved_reloc = FALSE; |
70256ad8 AJ |
3254 | break; |
3255 | ||
fd8ab9e5 AJ |
3256 | case R_X86_64_PC8: |
3257 | case R_X86_64_PC16: | |
3258 | case R_X86_64_PC32: | |
6610a52d | 3259 | if (info->shared |
351f65ca | 3260 | && ABI_64_P (output_bfd) |
ba3bee0b | 3261 | && (input_section->flags & SEC_ALLOC) != 0 |
90f487df | 3262 | && (input_section->flags & SEC_READONLY) != 0 |
41bed6dd | 3263 | && h != NULL) |
6610a52d | 3264 | { |
41bed6dd L |
3265 | bfd_boolean fail = FALSE; |
3266 | bfd_boolean branch | |
3267 | = (r_type == R_X86_64_PC32 | |
3268 | && is_32bit_relative_branch (contents, rel->r_offset)); | |
3269 | ||
3270 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
3271 | { | |
3272 | /* Symbol is referenced locally. Make sure it is | |
3273 | defined locally or for a branch. */ | |
3274 | fail = !h->def_regular && !branch; | |
3275 | } | |
90f487df | 3276 | else |
41bed6dd L |
3277 | { |
3278 | /* Symbol isn't referenced locally. We only allow | |
3279 | branch to symbol with non-default visibility. */ | |
3280 | fail = (!branch | |
3281 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT); | |
3282 | } | |
3283 | ||
3284 | if (fail) | |
3285 | { | |
3286 | const char *fmt; | |
3287 | const char *v; | |
3288 | const char *pic = ""; | |
3289 | ||
3290 | switch (ELF_ST_VISIBILITY (h->other)) | |
3291 | { | |
3292 | case STV_HIDDEN: | |
3293 | v = _("hidden symbol"); | |
3294 | break; | |
3295 | case STV_INTERNAL: | |
3296 | v = _("internal symbol"); | |
3297 | break; | |
3298 | case STV_PROTECTED: | |
3299 | v = _("protected symbol"); | |
3300 | break; | |
3301 | default: | |
3302 | v = _("symbol"); | |
3303 | pic = _("; recompile with -fPIC"); | |
3304 | break; | |
3305 | } | |
3306 | ||
3307 | if (h->def_regular) | |
3308 | fmt = _("%B: relocation %s against %s `%s' can not be used when making a shared object%s"); | |
3309 | else | |
3310 | fmt = _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s"); | |
3311 | ||
3312 | (*_bfd_error_handler) (fmt, input_bfd, | |
3313 | x86_64_elf_howto_table[r_type].name, | |
3314 | v, h->root.root.string, pic); | |
3315 | bfd_set_error (bfd_error_bad_value); | |
3316 | return FALSE; | |
3317 | } | |
6610a52d L |
3318 | } |
3319 | /* Fall through. */ | |
3320 | ||
70256ad8 AJ |
3321 | case R_X86_64_8: |
3322 | case R_X86_64_16: | |
3323 | case R_X86_64_32: | |
d6ab8113 | 3324 | case R_X86_64_PC64: |
6b3db546 | 3325 | case R_X86_64_64: |
80643fbc | 3326 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 3327 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 3328 | |
b1e24c02 | 3329 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
3330 | break; |
3331 | ||
3332 | if ((info->shared | |
4bc6e03a AJ |
3333 | && (h == NULL |
3334 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
3335 | || h->root.type != bfd_link_hash_undefweak) | |
d8045f23 NC |
3336 | && (! IS_X86_64_PCREL_TYPE (r_type) |
3337 | || ! SYMBOL_CALLS_LOCAL (info, h))) | |
d40d037c AJ |
3338 | || (ELIMINATE_COPY_RELOCS |
3339 | && !info->shared | |
c434dee6 AJ |
3340 | && h != NULL |
3341 | && h->dynindx != -1 | |
f5385ebf AM |
3342 | && !h->non_got_ref |
3343 | && ((h->def_dynamic | |
3344 | && !h->def_regular) | |
c434dee6 | 3345 | || h->root.type == bfd_link_hash_undefweak |
0f88be7a | 3346 | || h->root.type == bfd_link_hash_undefined))) |
70256ad8 AJ |
3347 | { |
3348 | Elf_Internal_Rela outrel; | |
b34976b6 | 3349 | bfd_boolean skip, relocate; |
c434dee6 | 3350 | asection *sreloc; |
70256ad8 AJ |
3351 | |
3352 | /* When generating a shared object, these relocations | |
3353 | are copied into the output file to be resolved at run | |
407443a3 | 3354 | time. */ |
b34976b6 AM |
3355 | skip = FALSE; |
3356 | relocate = FALSE; | |
70256ad8 | 3357 | |
c629eae0 JJ |
3358 | outrel.r_offset = |
3359 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 3360 | rel->r_offset); |
c629eae0 | 3361 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 3362 | skip = TRUE; |
0fb19cbc | 3363 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 3364 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
3365 | |
3366 | outrel.r_offset += (input_section->output_section->vma | |
3367 | + input_section->output_offset); | |
3368 | ||
3369 | if (skip) | |
0bb2d96a | 3370 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 3371 | |
fd8ab9e5 AJ |
3372 | /* h->dynindx may be -1 if this symbol was marked to |
3373 | become local. */ | |
3374 | else if (h != NULL | |
c434dee6 | 3375 | && h->dynindx != -1 |
d8045f23 NC |
3376 | && (IS_X86_64_PCREL_TYPE (r_type) |
3377 | || ! info->shared | |
3378 | || ! SYMBOLIC_BIND (info, h) | |
3379 | || ! h->def_regular)) | |
70256ad8 | 3380 | { |
351f65ca | 3381 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
c434dee6 | 3382 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
3383 | } |
3384 | else | |
3385 | { | |
c434dee6 | 3386 | /* This symbol is local, or marked to become local. */ |
248775ba | 3387 | if (r_type == htab->pointer_r_type) |
607c0e09 | 3388 | { |
b34976b6 | 3389 | relocate = TRUE; |
351f65ca | 3390 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
607c0e09 AS |
3391 | outrel.r_addend = relocation + rel->r_addend; |
3392 | } | |
3393 | else | |
3394 | { | |
3395 | long sindx; | |
3396 | ||
8517fae7 | 3397 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
3398 | sindx = 0; |
3399 | else if (sec == NULL || sec->owner == NULL) | |
3400 | { | |
3401 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 3402 | return FALSE; |
607c0e09 AS |
3403 | } |
3404 | else | |
3405 | { | |
3406 | asection *osec; | |
3407 | ||
74541ad4 AM |
3408 | /* We are turning this relocation into one |
3409 | against a section symbol. It would be | |
3410 | proper to subtract the symbol's value, | |
3411 | osec->vma, from the emitted reloc addend, | |
3412 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
3413 | osec = sec->output_section; |
3414 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
3415 | if (sindx == 0) |
3416 | { | |
3417 | asection *oi = htab->elf.text_index_section; | |
3418 | sindx = elf_section_data (oi)->dynindx; | |
3419 | } | |
3420 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
3421 | } |
3422 | ||
351f65ca | 3423 | outrel.r_info = htab->r_info (sindx, r_type); |
607c0e09 AS |
3424 | outrel.r_addend = relocation + rel->r_addend; |
3425 | } | |
70256ad8 AJ |
3426 | } |
3427 | ||
cbe950e9 | 3428 | sreloc = elf_section_data (input_section)->sreloc; |
d8045f23 | 3429 | |
62d78908 L |
3430 | if (sreloc == NULL || sreloc->contents == NULL) |
3431 | { | |
3432 | r = bfd_reloc_notsupported; | |
3433 | goto check_relocation_error; | |
3434 | } | |
c434dee6 | 3435 | |
351f65ca | 3436 | elf_append_rela (output_bfd, sreloc, &outrel); |
70256ad8 AJ |
3437 | |
3438 | /* If this reloc is against an external symbol, we do | |
3439 | not want to fiddle with the addend. Otherwise, we | |
3440 | need to include the symbol value so that it becomes | |
3441 | an addend for the dynamic reloc. */ | |
0f88be7a | 3442 | if (! relocate) |
70256ad8 AJ |
3443 | continue; |
3444 | } | |
3445 | ||
3446 | break; | |
3447 | ||
bffbf940 | 3448 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
3449 | case R_X86_64_GOTPC32_TLSDESC: |
3450 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 3451 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
3452 | tls_type = GOT_UNKNOWN; |
3453 | if (h == NULL && local_got_offsets) | |
351f65ca | 3454 | tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx]; |
bffbf940 | 3455 | else if (h != NULL) |
351f65ca | 3456 | tls_type = elf_x86_64_hash_entry (h)->tls_type; |
142411ca | 3457 | |
351f65ca L |
3458 | if (! elf_x86_64_tls_transition (info, input_bfd, |
3459 | input_section, contents, | |
3460 | symtab_hdr, sym_hashes, | |
3461 | &r_type, tls_type, rel, | |
3462 | relend, h, r_symndx)) | |
534a31f6 | 3463 | return FALSE; |
bffbf940 JJ |
3464 | |
3465 | if (r_type == R_X86_64_TPOFF32) | |
3466 | { | |
142411ca L |
3467 | bfd_vma roff = rel->r_offset; |
3468 | ||
bffbf940 | 3469 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 3470 | |
351f65ca | 3471 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
bffbf940 | 3472 | { |
52bc799a | 3473 | /* GD->LE transition. For 64bit, change |
abcf1d52 | 3474 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
a3fadc9a | 3475 | .word 0x6666; rex64; call __tls_get_addr |
52bc799a | 3476 | into: |
bffbf940 | 3477 | movq %fs:0, %rax |
52bc799a L |
3478 | leaq foo@tpoff(%rax), %rax |
3479 | For 32bit, change | |
3480 | leaq foo@tlsgd(%rip), %rdi | |
3481 | .word 0x6666; rex64; call __tls_get_addr | |
3482 | into: | |
3483 | movl %fs:0, %eax | |
bffbf940 | 3484 | leaq foo@tpoff(%rax), %rax */ |
52bc799a L |
3485 | if (ABI_64_P (output_bfd)) |
3486 | memcpy (contents + roff - 4, | |
3487 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3488 | 16); | |
3489 | else | |
3490 | memcpy (contents + roff - 3, | |
3491 | "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3492 | 15); | |
eb4ff4d6 | 3493 | bfd_put_32 (output_bfd, |
351f65ca | 3494 | elf_x86_64_tpoff (info, relocation), |
142411ca | 3495 | contents + roff + 8); |
a3fadc9a | 3496 | /* Skip R_X86_64_PC32/R_X86_64_PLT32. */ |
bffbf940 JJ |
3497 | rel++; |
3498 | continue; | |
3499 | } | |
351f65ca | 3500 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
67a4f2b7 AO |
3501 | { |
3502 | /* GDesc -> LE transition. | |
3503 | It's originally something like: | |
3504 | leaq x@tlsdesc(%rip), %rax | |
3505 | ||
3506 | Change it to: | |
c9736ba0 | 3507 | movl $x@tpoff, %rax. */ |
67a4f2b7 | 3508 | |
c9736ba0 | 3509 | unsigned int val, type; |
67a4f2b7 | 3510 | |
67a4f2b7 | 3511 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 3512 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
3513 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), |
3514 | contents + roff - 3); | |
3515 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
3516 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
3517 | contents + roff - 1); | |
eb4ff4d6 | 3518 | bfd_put_32 (output_bfd, |
351f65ca | 3519 | elf_x86_64_tpoff (info, relocation), |
67a4f2b7 AO |
3520 | contents + roff); |
3521 | continue; | |
3522 | } | |
351f65ca | 3523 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
67a4f2b7 AO |
3524 | { |
3525 | /* GDesc -> LE transition. | |
3526 | It's originally: | |
3527 | call *(%rax) | |
3528 | Turn it into: | |
142411ca | 3529 | xchg %ax,%ax. */ |
10efb593 | 3530 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
3531 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
3532 | continue; | |
3533 | } | |
351f65ca | 3534 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF) |
bffbf940 | 3535 | { |
bffbf940 JJ |
3536 | /* IE->LE transition: |
3537 | Originally it can be one of: | |
3538 | movq foo@gottpoff(%rip), %reg | |
3539 | addq foo@gottpoff(%rip), %reg | |
3540 | We change it into: | |
3541 | movq $foo, %reg | |
3542 | leaq foo(%reg), %reg | |
3543 | addq $foo, %reg. */ | |
142411ca L |
3544 | |
3545 | unsigned int val, type, reg; | |
3546 | ||
3547 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
3548 | type = bfd_get_8 (input_bfd, contents + roff - 2); | |
3549 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 3550 | reg >>= 3; |
bffbf940 JJ |
3551 | if (type == 0x8b) |
3552 | { | |
3553 | /* movq */ | |
3554 | if (val == 0x4c) | |
3555 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 3556 | contents + roff - 3); |
4a4c5f25 L |
3557 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
3558 | bfd_put_8 (output_bfd, 0x41, | |
3559 | contents + roff - 3); | |
bffbf940 | 3560 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 3561 | contents + roff - 2); |
bffbf940 | 3562 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 3563 | contents + roff - 1); |
bffbf940 JJ |
3564 | } |
3565 | else if (reg == 4) | |
3566 | { | |
3567 | /* addq -> addq - addressing with %rsp/%r12 is | |
3568 | special */ | |
3569 | if (val == 0x4c) | |
3570 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 3571 | contents + roff - 3); |
4a4c5f25 L |
3572 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
3573 | bfd_put_8 (output_bfd, 0x41, | |
3574 | contents + roff - 3); | |
bffbf940 | 3575 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 3576 | contents + roff - 2); |
bffbf940 | 3577 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 3578 | contents + roff - 1); |
bffbf940 JJ |
3579 | } |
3580 | else | |
3581 | { | |
3582 | /* addq -> leaq */ | |
3583 | if (val == 0x4c) | |
3584 | bfd_put_8 (output_bfd, 0x4d, | |
142411ca | 3585 | contents + roff - 3); |
4a4c5f25 L |
3586 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
3587 | bfd_put_8 (output_bfd, 0x45, | |
3588 | contents + roff - 3); | |
bffbf940 | 3589 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 3590 | contents + roff - 2); |
bffbf940 | 3591 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 3592 | contents + roff - 1); |
bffbf940 | 3593 | } |
eb4ff4d6 | 3594 | bfd_put_32 (output_bfd, |
351f65ca | 3595 | elf_x86_64_tpoff (info, relocation), |
142411ca | 3596 | contents + roff); |
bffbf940 JJ |
3597 | continue; |
3598 | } | |
142411ca L |
3599 | else |
3600 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
3601 | } |
3602 | ||
6de2ae4a | 3603 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
3604 | abort (); |
3605 | ||
3606 | if (h != NULL) | |
67a4f2b7 AO |
3607 | { |
3608 | off = h->got.offset; | |
351f65ca | 3609 | offplt = elf_x86_64_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 3610 | } |
bffbf940 JJ |
3611 | else |
3612 | { | |
3613 | if (local_got_offsets == NULL) | |
3614 | abort (); | |
3615 | ||
3616 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 3617 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
3618 | } |
3619 | ||
3620 | if ((off & 1) != 0) | |
3621 | off &= ~1; | |
26e41594 | 3622 | else |
bffbf940 JJ |
3623 | { |
3624 | Elf_Internal_Rela outrel; | |
bffbf940 | 3625 | int dr_type, indx; |
67a4f2b7 | 3626 | asection *sreloc; |
bffbf940 | 3627 | |
6de2ae4a | 3628 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
3629 | abort (); |
3630 | ||
67a4f2b7 AO |
3631 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
3632 | ||
3633 | if (GOT_TLS_GDESC_P (tls_type)) | |
3634 | { | |
351f65ca | 3635 | outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC); |
67a4f2b7 | 3636 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt |
6de2ae4a L |
3637 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
3638 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
3639 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3640 | + offplt |
3641 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 3642 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 3643 | if (indx == 0) |
351f65ca | 3644 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
67a4f2b7 AO |
3645 | else |
3646 | outrel.r_addend = 0; | |
351f65ca | 3647 | elf_append_rela (output_bfd, sreloc, &outrel); |
67a4f2b7 AO |
3648 | } |
3649 | ||
6de2ae4a | 3650 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 3651 | |
6de2ae4a L |
3652 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3653 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 3654 | |
67a4f2b7 | 3655 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 3656 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
3657 | else if (GOT_TLS_GDESC_P (tls_type)) |
3658 | goto dr_done; | |
bffbf940 JJ |
3659 | else |
3660 | dr_type = R_X86_64_TPOFF64; | |
3661 | ||
6de2ae4a | 3662 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 3663 | outrel.r_addend = 0; |
67a4f2b7 AO |
3664 | if ((dr_type == R_X86_64_TPOFF64 |
3665 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
351f65ca L |
3666 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
3667 | outrel.r_info = htab->r_info (indx, dr_type); | |
bffbf940 | 3668 | |
351f65ca | 3669 | elf_append_rela (output_bfd, sreloc, &outrel); |
bffbf940 | 3670 | |
67a4f2b7 | 3671 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
3672 | { |
3673 | if (indx == 0) | |
3674 | { | |
d40d037c | 3675 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 3676 | bfd_put_64 (output_bfd, |
351f65ca | 3677 | relocation - elf_x86_64_dtpoff_base (info), |
6de2ae4a | 3678 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
3679 | } |
3680 | else | |
3681 | { | |
3682 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 3683 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 3684 | outrel.r_info = htab->r_info (indx, |
bffbf940 JJ |
3685 | R_X86_64_DTPOFF64); |
3686 | outrel.r_offset += GOT_ENTRY_SIZE; | |
351f65ca | 3687 | elf_append_rela (output_bfd, sreloc, |
464d3bd4 | 3688 | &outrel); |
bffbf940 JJ |
3689 | } |
3690 | } | |
3691 | ||
67a4f2b7 | 3692 | dr_done: |
bffbf940 JJ |
3693 | if (h != NULL) |
3694 | h->got.offset |= 1; | |
3695 | else | |
3696 | local_got_offsets[r_symndx] |= 1; | |
3697 | } | |
3698 | ||
67a4f2b7 AO |
3699 | if (off >= (bfd_vma) -2 |
3700 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 | 3701 | abort (); |
351f65ca | 3702 | if (r_type == ELF32_R_TYPE (rel->r_info)) |
bffbf940 | 3703 | { |
67a4f2b7 AO |
3704 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
3705 | || r_type == R_X86_64_TLSDESC_CALL) | |
6de2ae4a L |
3706 | relocation = htab->elf.sgotplt->output_section->vma |
3707 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3708 | + offplt + htab->sgotplt_jump_table_size; |
3709 | else | |
6de2ae4a L |
3710 | relocation = htab->elf.sgot->output_section->vma |
3711 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 3712 | unresolved_reloc = FALSE; |
bffbf940 | 3713 | } |
142411ca | 3714 | else |
67a4f2b7 | 3715 | { |
142411ca | 3716 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 3717 | |
351f65ca | 3718 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
142411ca | 3719 | { |
52bc799a | 3720 | /* GD->IE transition. For 64bit, change |
142411ca L |
3721 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
3722 | .word 0x6666; rex64; call __tls_get_addr@plt | |
52bc799a | 3723 | into: |
142411ca | 3724 | movq %fs:0, %rax |
52bc799a L |
3725 | addq foo@gottpoff(%rip), %rax |
3726 | For 32bit, change | |
3727 | leaq foo@tlsgd(%rip), %rdi | |
3728 | .word 0x6666; rex64; call __tls_get_addr@plt | |
3729 | into: | |
3730 | movl %fs:0, %eax | |
142411ca | 3731 | addq foo@gottpoff(%rip), %rax */ |
52bc799a L |
3732 | if (ABI_64_P (output_bfd)) |
3733 | memcpy (contents + roff - 4, | |
3734 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
3735 | 16); | |
3736 | else | |
3737 | memcpy (contents + roff - 3, | |
3738 | "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
3739 | 15); | |
142411ca | 3740 | |
6de2ae4a L |
3741 | relocation = (htab->elf.sgot->output_section->vma |
3742 | + htab->elf.sgot->output_offset + off | |
142411ca L |
3743 | - roff |
3744 | - input_section->output_section->vma | |
3745 | - input_section->output_offset | |
3746 | - 12); | |
3747 | bfd_put_32 (output_bfd, relocation, | |
3748 | contents + roff + 8); | |
3749 | /* Skip R_X86_64_PLT32. */ | |
3750 | rel++; | |
3751 | continue; | |
3752 | } | |
351f65ca | 3753 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
142411ca L |
3754 | { |
3755 | /* GDesc -> IE transition. | |
3756 | It's originally something like: | |
3757 | leaq x@tlsdesc(%rip), %rax | |
67a4f2b7 | 3758 | |
142411ca | 3759 | Change it to: |
c9736ba0 | 3760 | movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */ |
67a4f2b7 | 3761 | |
142411ca L |
3762 | /* Now modify the instruction as appropriate. To |
3763 | turn a leaq into a movq in the form we use it, it | |
3764 | suffices to change the second byte from 0x8d to | |
3765 | 0x8b. */ | |
3766 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
3767 | ||
3768 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
3769 | htab->elf.sgot->output_section->vma |
3770 | + htab->elf.sgot->output_offset + off | |
142411ca L |
3771 | - rel->r_offset |
3772 | - input_section->output_section->vma | |
3773 | - input_section->output_offset | |
3774 | - 4, | |
3775 | contents + roff); | |
3776 | continue; | |
3777 | } | |
351f65ca | 3778 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
142411ca L |
3779 | { |
3780 | /* GDesc -> IE transition. | |
3781 | It's originally: | |
3782 | call *(%rax) | |
3783 | ||
3784 | Change it to: | |
c9736ba0 | 3785 | xchg %ax, %ax. */ |
142411ca | 3786 | |
142411ca L |
3787 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
3788 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
3789 | continue; | |
3790 | } | |
3791 | else | |
3792 | BFD_ASSERT (FALSE); | |
67a4f2b7 | 3793 | } |
bffbf940 JJ |
3794 | break; |
3795 | ||
3796 | case R_X86_64_TLSLD: | |
351f65ca L |
3797 | if (! elf_x86_64_tls_transition (info, input_bfd, |
3798 | input_section, contents, | |
3799 | symtab_hdr, sym_hashes, | |
3800 | &r_type, GOT_UNKNOWN, | |
3801 | rel, relend, h, r_symndx)) | |
142411ca | 3802 | return FALSE; |
a3fadc9a | 3803 | |
142411ca L |
3804 | if (r_type != R_X86_64_TLSLD) |
3805 | { | |
bffbf940 | 3806 | /* LD->LE transition: |
a3fadc9a | 3807 | leaq foo@tlsld(%rip), %rdi; call __tls_get_addr. |
52bc799a L |
3808 | For 64bit, we change it into: |
3809 | .word 0x6666; .byte 0x66; movq %fs:0, %rax. | |
3810 | For 32bit, we change it into: | |
3811 | nopl 0x0(%rax); movl %fs:0, %eax. */ | |
142411ca L |
3812 | |
3813 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
52bc799a L |
3814 | if (ABI_64_P (output_bfd)) |
3815 | memcpy (contents + rel->r_offset - 3, | |
3816 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
3817 | else | |
3818 | memcpy (contents + rel->r_offset - 3, | |
3819 | "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12); | |
a3fadc9a | 3820 | /* Skip R_X86_64_PC32/R_X86_64_PLT32. */ |
bffbf940 JJ |
3821 | rel++; |
3822 | continue; | |
3823 | } | |
3824 | ||
6de2ae4a | 3825 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
3826 | abort (); |
3827 | ||
3828 | off = htab->tls_ld_got.offset; | |
3829 | if (off & 1) | |
3830 | off &= ~1; | |
3831 | else | |
3832 | { | |
3833 | Elf_Internal_Rela outrel; | |
bffbf940 | 3834 | |
6de2ae4a | 3835 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
3836 | abort (); |
3837 | ||
6de2ae4a L |
3838 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3839 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
3840 | |
3841 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 3842 | htab->elf.sgot->contents + off); |
bffbf940 | 3843 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 3844 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 3845 | outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64); |
bffbf940 | 3846 | outrel.r_addend = 0; |
351f65ca | 3847 | elf_append_rela (output_bfd, htab->elf.srelgot, |
464d3bd4 | 3848 | &outrel); |
bffbf940 JJ |
3849 | htab->tls_ld_got.offset |= 1; |
3850 | } | |
6de2ae4a L |
3851 | relocation = htab->elf.sgot->output_section->vma |
3852 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 3853 | unresolved_reloc = FALSE; |
bffbf940 JJ |
3854 | break; |
3855 | ||
3856 | case R_X86_64_DTPOFF32: | |
1d85728f | 3857 | if (!info->executable|| (input_section->flags & SEC_CODE) == 0) |
351f65ca | 3858 | relocation -= elf_x86_64_dtpoff_base (info); |
bffbf940 | 3859 | else |
351f65ca | 3860 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
3861 | break; |
3862 | ||
3863 | case R_X86_64_TPOFF32: | |
9b769489 | 3864 | BFD_ASSERT (info->executable); |
351f65ca | 3865 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
3866 | break; |
3867 | ||
70256ad8 AJ |
3868 | default: |
3869 | break; | |
3870 | } | |
8d88c4ca | 3871 | |
239e1f3a AM |
3872 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
3873 | because such sections are not SEC_ALLOC and thus ld.so will | |
3874 | not process them. */ | |
c434dee6 | 3875 | if (unresolved_reloc |
239e1f3a | 3876 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
f5385ebf | 3877 | && h->def_dynamic)) |
c434dee6 | 3878 | (*_bfd_error_handler) |
843fe662 | 3879 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
3880 | input_bfd, |
3881 | input_section, | |
c434dee6 | 3882 | (long) rel->r_offset, |
843fe662 | 3883 | howto->name, |
c434dee6 AJ |
3884 | h->root.root.string); |
3885 | ||
cbe950e9 | 3886 | do_relocation: |
8d88c4ca | 3887 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
3888 | contents, rel->r_offset, |
3889 | relocation, rel->r_addend); | |
8d88c4ca | 3890 | |
62d78908 | 3891 | check_relocation_error: |
8d88c4ca | 3892 | if (r != bfd_reloc_ok) |
8da6118f | 3893 | { |
c434dee6 AJ |
3894 | const char *name; |
3895 | ||
3896 | if (h != NULL) | |
3897 | name = h->root.root.string; | |
3898 | else | |
8da6118f | 3899 | { |
c434dee6 AJ |
3900 | name = bfd_elf_string_from_elf_section (input_bfd, |
3901 | symtab_hdr->sh_link, | |
3902 | sym->st_name); | |
3903 | if (name == NULL) | |
b34976b6 | 3904 | return FALSE; |
c434dee6 AJ |
3905 | if (*name == '\0') |
3906 | name = bfd_section_name (input_bfd, sec); | |
3907 | } | |
3908 | ||
3909 | if (r == bfd_reloc_overflow) | |
3910 | { | |
c434dee6 | 3911 | if (! ((*info->callbacks->reloc_overflow) |
dfeffb9f L |
3912 | (info, (h ? &h->root : NULL), name, howto->name, |
3913 | (bfd_vma) 0, input_bfd, input_section, | |
3914 | rel->r_offset))) | |
b34976b6 | 3915 | return FALSE; |
c434dee6 AJ |
3916 | } |
3917 | else | |
3918 | { | |
3919 | (*_bfd_error_handler) | |
bb95161d | 3920 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
d003868e | 3921 | input_bfd, input_section, |
c434dee6 | 3922 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 3923 | return FALSE; |
8da6118f KH |
3924 | } |
3925 | } | |
8d88c4ca | 3926 | } |
70256ad8 | 3927 | |
b34976b6 | 3928 | return TRUE; |
70256ad8 AJ |
3929 | } |
3930 | ||
3931 | /* Finish up dynamic symbol handling. We set the contents of various | |
3932 | dynamic sections here. */ | |
3933 | ||
b34976b6 | 3934 | static bfd_boolean |
351f65ca L |
3935 | elf_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
3936 | struct bfd_link_info *info, | |
3937 | struct elf_link_hash_entry *h, | |
3938 | Elf_Internal_Sym *sym) | |
70256ad8 | 3939 | { |
351f65ca | 3940 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 | 3941 | |
351f65ca | 3942 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3943 | if (htab == NULL) |
3944 | return FALSE; | |
70256ad8 AJ |
3945 | |
3946 | if (h->plt.offset != (bfd_vma) -1) | |
3947 | { | |
70256ad8 AJ |
3948 | bfd_vma plt_index; |
3949 | bfd_vma got_offset; | |
3950 | Elf_Internal_Rela rela; | |
947216bf | 3951 | bfd_byte *loc; |
cbe950e9 | 3952 | asection *plt, *gotplt, *relplt; |
351f65ca | 3953 | const struct elf_backend_data *bed; |
cbe950e9 L |
3954 | |
3955 | /* When building a static executable, use .iplt, .igot.plt and | |
3956 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 3957 | if (htab->elf.splt != NULL) |
cbe950e9 | 3958 | { |
6de2ae4a L |
3959 | plt = htab->elf.splt; |
3960 | gotplt = htab->elf.sgotplt; | |
3961 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
3962 | } |
3963 | else | |
3964 | { | |
6de2ae4a L |
3965 | plt = htab->elf.iplt; |
3966 | gotplt = htab->elf.igotplt; | |
3967 | relplt = htab->elf.irelplt; | |
cbe950e9 | 3968 | } |
70256ad8 AJ |
3969 | |
3970 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 3971 | it up. */ |
cbe950e9 L |
3972 | if ((h->dynindx == -1 |
3973 | && !((h->forced_local || info->executable) | |
3974 | && h->def_regular | |
3975 | && h->type == STT_GNU_IFUNC)) | |
3976 | || plt == NULL | |
3977 | || gotplt == NULL | |
3978 | || relplt == NULL) | |
f6df62c8 | 3979 | return FALSE; |
70256ad8 AJ |
3980 | |
3981 | /* Get the index in the procedure linkage table which | |
3982 | corresponds to this symbol. This is the index of this symbol | |
3983 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 3984 | first entry in the procedure linkage table is reserved. |
6bbec505 | 3985 | |
cbe950e9 | 3986 | Get the offset into the .got table of the entry that |
407443a3 | 3987 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
3988 | bytes. The first three are reserved for the dynamic linker. |
3989 | ||
3990 | For static executables, we don't reserve anything. */ | |
3991 | ||
6de2ae4a | 3992 | if (plt == htab->elf.splt) |
cbe950e9 L |
3993 | { |
3994 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
3995 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; | |
3996 | } | |
3997 | else | |
3998 | { | |
3999 | plt_index = h->plt.offset / PLT_ENTRY_SIZE; | |
4000 | got_offset = plt_index * GOT_ENTRY_SIZE; | |
4001 | } | |
70256ad8 AJ |
4002 | |
4003 | /* Fill in the entry in the procedure linkage table. */ | |
351f65ca | 4004 | memcpy (plt->contents + h->plt.offset, elf_x86_64_plt_entry, |
70256ad8 AJ |
4005 | PLT_ENTRY_SIZE); |
4006 | ||
4007 | /* Insert the relocation positions of the plt section. The magic | |
4008 | numbers at the end of the statements are the positions of the | |
4009 | relocations in the plt section. */ | |
653165cc AJ |
4010 | /* Put offset for jmp *name@GOTPCREL(%rip), since the |
4011 | instruction uses 6 bytes, subtract this value. */ | |
4012 | bfd_put_32 (output_bfd, | |
cbe950e9 L |
4013 | (gotplt->output_section->vma |
4014 | + gotplt->output_offset | |
653165cc | 4015 | + got_offset |
cbe950e9 L |
4016 | - plt->output_section->vma |
4017 | - plt->output_offset | |
653165cc AJ |
4018 | - h->plt.offset |
4019 | - 6), | |
cbe950e9 L |
4020 | plt->contents + h->plt.offset + 2); |
4021 | ||
4022 | /* Don't fill PLT entry for static executables. */ | |
6de2ae4a | 4023 | if (plt == htab->elf.splt) |
cbe950e9 L |
4024 | { |
4025 | /* Put relocation index. */ | |
4026 | bfd_put_32 (output_bfd, plt_index, | |
4027 | plt->contents + h->plt.offset + 7); | |
4028 | /* Put offset for jmp .PLT0. */ | |
4029 | bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE), | |
4030 | plt->contents + h->plt.offset + 12); | |
4031 | } | |
70256ad8 | 4032 | |
653165cc AJ |
4033 | /* Fill in the entry in the global offset table, initially this |
4034 | points to the pushq instruction in the PLT which is at offset 6. */ | |
cbe950e9 L |
4035 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4036 | + plt->output_offset | |
70256ad8 | 4037 | + h->plt.offset + 6), |
cbe950e9 | 4038 | gotplt->contents + got_offset); |
70256ad8 AJ |
4039 | |
4040 | /* Fill in the entry in the .rela.plt section. */ | |
cbe950e9 L |
4041 | rela.r_offset = (gotplt->output_section->vma |
4042 | + gotplt->output_offset | |
70256ad8 | 4043 | + got_offset); |
cbe950e9 L |
4044 | if (h->dynindx == -1 |
4045 | || ((info->executable | |
4046 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
4047 | && h->def_regular | |
4048 | && h->type == STT_GNU_IFUNC)) | |
4049 | { | |
4050 | /* If an STT_GNU_IFUNC symbol is locally defined, generate | |
4051 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
351f65ca | 4052 | rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
cbe950e9 L |
4053 | rela.r_addend = (h->root.u.def.value |
4054 | + h->root.u.def.section->output_section->vma | |
4055 | + h->root.u.def.section->output_offset); | |
4056 | } | |
4057 | else | |
4058 | { | |
351f65ca | 4059 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT); |
cbe950e9 L |
4060 | rela.r_addend = 0; |
4061 | } | |
351f65ca L |
4062 | |
4063 | bed = get_elf_backend_data (output_bfd); | |
4064 | loc = relplt->contents + plt_index * bed->s->sizeof_rela; | |
82e96e07 | 4065 | bed->s->swap_reloca_out (output_bfd, &rela, loc); |
70256ad8 | 4066 | |
f5385ebf | 4067 | if (!h->def_regular) |
70256ad8 AJ |
4068 | { |
4069 | /* Mark the symbol as undefined, rather than as defined in | |
47a9f7b3 JJ |
4070 | the .plt section. Leave the value if there were any |
4071 | relocations where pointer equality matters (this is a clue | |
c434dee6 AJ |
4072 | for the dynamic linker, to make function pointer |
4073 | comparisons work between an application and shared | |
47a9f7b3 JJ |
4074 | library), otherwise set it to zero. If a function is only |
4075 | called from a binary, there is no need to slow down | |
4076 | shared libraries because of that. */ | |
70256ad8 | 4077 | sym->st_shndx = SHN_UNDEF; |
f5385ebf | 4078 | if (!h->pointer_equality_needed) |
47a9f7b3 | 4079 | sym->st_value = 0; |
70256ad8 AJ |
4080 | } |
4081 | } | |
4082 | ||
bffbf940 | 4083 | if (h->got.offset != (bfd_vma) -1 |
351f65ca L |
4084 | && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type) |
4085 | && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE) | |
053579d7 | 4086 | { |
053579d7 AJ |
4087 | Elf_Internal_Rela rela; |
4088 | ||
4089 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 4090 | up. */ |
6de2ae4a | 4091 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 4092 | abort (); |
053579d7 | 4093 | |
6de2ae4a L |
4094 | rela.r_offset = (htab->elf.sgot->output_section->vma |
4095 | + htab->elf.sgot->output_offset | |
dc810e39 | 4096 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
4097 | |
4098 | /* If this is a static link, or it is a -Bsymbolic link and the | |
4099 | symbol is defined locally or was forced to be local because | |
4100 | of a version file, we just want to emit a RELATIVE reloc. | |
4101 | The entry in the global offset table will already have been | |
4102 | initialized in the relocate_section function. */ | |
710ab287 | 4103 | if (h->def_regular |
0018b0a3 L |
4104 | && h->type == STT_GNU_IFUNC) |
4105 | { | |
710ab287 L |
4106 | if (info->shared) |
4107 | { | |
4108 | /* Generate R_X86_64_GLOB_DAT. */ | |
4109 | goto do_glob_dat; | |
4110 | } | |
4111 | else | |
4112 | { | |
90d60710 L |
4113 | asection *plt; |
4114 | ||
710ab287 L |
4115 | if (!h->pointer_equality_needed) |
4116 | abort (); | |
4117 | ||
4118 | /* For non-shared object, we can't use .got.plt, which | |
4119 | contains the real function addres if we need pointer | |
4120 | equality. We load the GOT entry with the PLT entry. */ | |
90d60710 | 4121 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
710ab287 L |
4122 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4123 | + plt->output_offset | |
4124 | + h->plt.offset), | |
6de2ae4a | 4125 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
4126 | return TRUE; |
4127 | } | |
0018b0a3 L |
4128 | } |
4129 | else if (info->shared | |
4130 | && SYMBOL_REFERENCES_LOCAL (info, h)) | |
053579d7 | 4131 | { |
41bed6dd L |
4132 | if (!h->def_regular) |
4133 | return FALSE; | |
cc78d0af | 4134 | BFD_ASSERT((h->got.offset & 1) != 0); |
351f65ca | 4135 | rela.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
053579d7 AJ |
4136 | rela.r_addend = (h->root.u.def.value |
4137 | + h->root.u.def.section->output_section->vma | |
4138 | + h->root.u.def.section->output_offset); | |
4139 | } | |
4140 | else | |
4141 | { | |
4142 | BFD_ASSERT((h->got.offset & 1) == 0); | |
710ab287 | 4143 | do_glob_dat: |
c434dee6 | 4144 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 4145 | htab->elf.sgot->contents + h->got.offset); |
351f65ca | 4146 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT); |
053579d7 AJ |
4147 | rela.r_addend = 0; |
4148 | } | |
4149 | ||
351f65ca | 4150 | elf_append_rela (output_bfd, htab->elf.srelgot, &rela); |
053579d7 AJ |
4151 | } |
4152 | ||
f5385ebf | 4153 | if (h->needs_copy) |
70256ad8 | 4154 | { |
70256ad8 AJ |
4155 | Elf_Internal_Rela rela; |
4156 | ||
4157 | /* This symbol needs a copy reloc. Set it up. */ | |
4158 | ||
c434dee6 AJ |
4159 | if (h->dynindx == -1 |
4160 | || (h->root.type != bfd_link_hash_defined | |
4161 | && h->root.type != bfd_link_hash_defweak) | |
4162 | || htab->srelbss == NULL) | |
4163 | abort (); | |
70256ad8 AJ |
4164 | |
4165 | rela.r_offset = (h->root.u.def.value | |
4166 | + h->root.u.def.section->output_section->vma | |
4167 | + h->root.u.def.section->output_offset); | |
351f65ca | 4168 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY); |
70256ad8 | 4169 | rela.r_addend = 0; |
351f65ca | 4170 | elf_append_rela (output_bfd, htab->srelbss, &rela); |
70256ad8 AJ |
4171 | } |
4172 | ||
c25bc9fc L |
4173 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may |
4174 | be NULL for local symbols. */ | |
4175 | if (sym != NULL | |
4176 | && (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
4177 | || h == htab->elf.hgot)) | |
70256ad8 AJ |
4178 | sym->st_shndx = SHN_ABS; |
4179 | ||
b34976b6 | 4180 | return TRUE; |
70256ad8 AJ |
4181 | } |
4182 | ||
c25bc9fc L |
4183 | /* Finish up local dynamic symbol handling. We set the contents of |
4184 | various dynamic sections here. */ | |
4185 | ||
4186 | static bfd_boolean | |
351f65ca | 4187 | elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) |
c25bc9fc L |
4188 | { |
4189 | struct elf_link_hash_entry *h | |
4190 | = (struct elf_link_hash_entry *) *slot; | |
4191 | struct bfd_link_info *info | |
4192 | = (struct bfd_link_info *) inf; | |
4193 | ||
351f65ca | 4194 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, |
c25bc9fc L |
4195 | info, h, NULL); |
4196 | } | |
4197 | ||
c434dee6 AJ |
4198 | /* Used to decide how to sort relocs in an optimal manner for the |
4199 | dynamic linker, before writing them out. */ | |
4200 | ||
4201 | static enum elf_reloc_type_class | |
351f65ca | 4202 | elf_x86_64_reloc_type_class (const Elf_Internal_Rela *rela) |
c434dee6 | 4203 | { |
351f65ca | 4204 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
c434dee6 AJ |
4205 | { |
4206 | case R_X86_64_RELATIVE: | |
4207 | return reloc_class_relative; | |
4208 | case R_X86_64_JUMP_SLOT: | |
4209 | return reloc_class_plt; | |
4210 | case R_X86_64_COPY: | |
4211 | return reloc_class_copy; | |
4212 | default: | |
4213 | return reloc_class_normal; | |
4214 | } | |
4215 | } | |
4216 | ||
70256ad8 AJ |
4217 | /* Finish up the dynamic sections. */ |
4218 | ||
b34976b6 | 4219 | static bfd_boolean |
351f65ca L |
4220 | elf_x86_64_finish_dynamic_sections (bfd *output_bfd, |
4221 | struct bfd_link_info *info) | |
70256ad8 | 4222 | { |
351f65ca | 4223 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
4224 | bfd *dynobj; |
4225 | asection *sdyn; | |
70256ad8 | 4226 | |
351f65ca | 4227 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
4228 | if (htab == NULL) |
4229 | return FALSE; | |
4230 | ||
c434dee6 | 4231 | dynobj = htab->elf.dynobj; |
70256ad8 AJ |
4232 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
4233 | ||
c434dee6 | 4234 | if (htab->elf.dynamic_sections_created) |
70256ad8 | 4235 | { |
82e96e07 L |
4236 | bfd_byte *dyncon, *dynconend; |
4237 | const struct elf_backend_data *bed; | |
4238 | bfd_size_type sizeof_dyn; | |
70256ad8 | 4239 | |
6de2ae4a | 4240 | if (sdyn == NULL || htab->elf.sgot == NULL) |
c434dee6 | 4241 | abort (); |
70256ad8 | 4242 | |
82e96e07 L |
4243 | bed = get_elf_backend_data (dynobj); |
4244 | sizeof_dyn = bed->s->sizeof_dyn; | |
4245 | dyncon = sdyn->contents; | |
4246 | dynconend = sdyn->contents + sdyn->size; | |
4247 | for (; dyncon < dynconend; dyncon += sizeof_dyn) | |
70256ad8 AJ |
4248 | { |
4249 | Elf_Internal_Dyn dyn; | |
70256ad8 AJ |
4250 | asection *s; |
4251 | ||
82e96e07 | 4252 | (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn); |
70256ad8 AJ |
4253 | |
4254 | switch (dyn.d_tag) | |
4255 | { | |
4256 | default: | |
053579d7 | 4257 | continue; |
70256ad8 AJ |
4258 | |
4259 | case DT_PLTGOT: | |
6de2ae4a | 4260 | s = htab->elf.sgotplt; |
8c37241b | 4261 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
c434dee6 | 4262 | break; |
70256ad8 AJ |
4263 | |
4264 | case DT_JMPREL: | |
6de2ae4a | 4265 | dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma; |
c434dee6 | 4266 | break; |
70256ad8 | 4267 | |
c434dee6 | 4268 | case DT_PLTRELSZ: |
6de2ae4a | 4269 | s = htab->elf.srelplt->output_section; |
eea6121a | 4270 | dyn.d_un.d_val = s->size; |
70256ad8 AJ |
4271 | break; |
4272 | ||
4273 | case DT_RELASZ: | |
c434dee6 AJ |
4274 | /* The procedure linkage table relocs (DT_JMPREL) should |
4275 | not be included in the overall relocs (DT_RELA). | |
4276 | Therefore, we override the DT_RELASZ entry here to | |
4277 | make it not include the JMPREL relocs. Since the | |
4278 | linker script arranges for .rela.plt to follow all | |
4279 | other relocation sections, we don't have to worry | |
4280 | about changing the DT_RELA entry. */ | |
6de2ae4a | 4281 | if (htab->elf.srelplt != NULL) |
70256ad8 | 4282 | { |
6de2ae4a | 4283 | s = htab->elf.srelplt->output_section; |
eea6121a | 4284 | dyn.d_un.d_val -= s->size; |
70256ad8 AJ |
4285 | } |
4286 | break; | |
67a4f2b7 AO |
4287 | |
4288 | case DT_TLSDESC_PLT: | |
6de2ae4a | 4289 | s = htab->elf.splt; |
67a4f2b7 AO |
4290 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
4291 | + htab->tlsdesc_plt; | |
4292 | break; | |
4293 | ||
4294 | case DT_TLSDESC_GOT: | |
6de2ae4a | 4295 | s = htab->elf.sgot; |
67a4f2b7 AO |
4296 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
4297 | + htab->tlsdesc_got; | |
4298 | break; | |
70256ad8 | 4299 | } |
c434dee6 | 4300 | |
82e96e07 | 4301 | (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon); |
70256ad8 AJ |
4302 | } |
4303 | ||
c434dee6 | 4304 | /* Fill in the special first entry in the procedure linkage table. */ |
6de2ae4a | 4305 | if (htab->elf.splt && htab->elf.splt->size > 0) |
70256ad8 | 4306 | { |
653165cc | 4307 | /* Fill in the first entry in the procedure linkage table. */ |
351f65ca | 4308 | memcpy (htab->elf.splt->contents, elf_x86_64_plt0_entry, |
c434dee6 | 4309 | PLT_ENTRY_SIZE); |
653165cc AJ |
4310 | /* Add offset for pushq GOT+8(%rip), since the instruction |
4311 | uses 6 bytes subtract this value. */ | |
4312 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4313 | (htab->elf.sgotplt->output_section->vma |
4314 | + htab->elf.sgotplt->output_offset | |
653165cc | 4315 | + 8 |
6de2ae4a L |
4316 | - htab->elf.splt->output_section->vma |
4317 | - htab->elf.splt->output_offset | |
653165cc | 4318 | - 6), |
6de2ae4a | 4319 | htab->elf.splt->contents + 2); |
653165cc AJ |
4320 | /* Add offset for jmp *GOT+16(%rip). The 12 is the offset to |
4321 | the end of the instruction. */ | |
4322 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4323 | (htab->elf.sgotplt->output_section->vma |
4324 | + htab->elf.sgotplt->output_offset | |
653165cc | 4325 | + 16 |
6de2ae4a L |
4326 | - htab->elf.splt->output_section->vma |
4327 | - htab->elf.splt->output_offset | |
653165cc | 4328 | - 12), |
6de2ae4a | 4329 | htab->elf.splt->contents + 8); |
653165cc | 4330 | |
6de2ae4a | 4331 | elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize = |
c434dee6 | 4332 | PLT_ENTRY_SIZE; |
67a4f2b7 AO |
4333 | |
4334 | if (htab->tlsdesc_plt) | |
4335 | { | |
4336 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
6de2ae4a | 4337 | htab->elf.sgot->contents + htab->tlsdesc_got); |
67a4f2b7 | 4338 | |
6de2ae4a | 4339 | memcpy (htab->elf.splt->contents + htab->tlsdesc_plt, |
351f65ca | 4340 | elf_x86_64_plt0_entry, |
67a4f2b7 AO |
4341 | PLT_ENTRY_SIZE); |
4342 | ||
4343 | /* Add offset for pushq GOT+8(%rip), since the | |
4344 | instruction uses 6 bytes subtract this value. */ | |
4345 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4346 | (htab->elf.sgotplt->output_section->vma |
4347 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 | 4348 | + 8 |
6de2ae4a L |
4349 | - htab->elf.splt->output_section->vma |
4350 | - htab->elf.splt->output_offset | |
67a4f2b7 AO |
4351 | - htab->tlsdesc_plt |
4352 | - 6), | |
6de2ae4a | 4353 | htab->elf.splt->contents + htab->tlsdesc_plt + 2); |
67a4f2b7 AO |
4354 | /* Add offset for jmp *GOT+TDG(%rip), where TGD stands for |
4355 | htab->tlsdesc_got. The 12 is the offset to the end of | |
4356 | the instruction. */ | |
4357 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4358 | (htab->elf.sgot->output_section->vma |
4359 | + htab->elf.sgot->output_offset | |
67a4f2b7 | 4360 | + htab->tlsdesc_got |
6de2ae4a L |
4361 | - htab->elf.splt->output_section->vma |
4362 | - htab->elf.splt->output_offset | |
67a4f2b7 AO |
4363 | - htab->tlsdesc_plt |
4364 | - 12), | |
6de2ae4a | 4365 | htab->elf.splt->contents + htab->tlsdesc_plt + 8); |
67a4f2b7 | 4366 | } |
70256ad8 | 4367 | } |
70256ad8 AJ |
4368 | } |
4369 | ||
6de2ae4a | 4370 | if (htab->elf.sgotplt) |
70256ad8 | 4371 | { |
56d4289c L |
4372 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
4373 | { | |
4374 | (*_bfd_error_handler) | |
4375 | (_("discarded output section: `%A'"), htab->elf.sgotplt); | |
4376 | return FALSE; | |
4377 | } | |
4378 | ||
c434dee6 | 4379 | /* Fill in the first three entries in the global offset table. */ |
6de2ae4a | 4380 | if (htab->elf.sgotplt->size > 0) |
c434dee6 AJ |
4381 | { |
4382 | /* Set the first entry in the global offset table to the address of | |
4383 | the dynamic section. */ | |
4384 | if (sdyn == NULL) | |
6de2ae4a | 4385 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents); |
c434dee6 AJ |
4386 | else |
4387 | bfd_put_64 (output_bfd, | |
4388 | sdyn->output_section->vma + sdyn->output_offset, | |
6de2ae4a | 4389 | htab->elf.sgotplt->contents); |
c434dee6 | 4390 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ |
6de2ae4a L |
4391 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE); |
4392 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2); | |
c434dee6 | 4393 | } |
70256ad8 | 4394 | |
6de2ae4a | 4395 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = |
c434dee6 AJ |
4396 | GOT_ENTRY_SIZE; |
4397 | } | |
70256ad8 | 4398 | |
6de2ae4a L |
4399 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
4400 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize | |
8c37241b JJ |
4401 | = GOT_ENTRY_SIZE; |
4402 | ||
c25bc9fc L |
4403 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ |
4404 | htab_traverse (htab->loc_hash_table, | |
351f65ca | 4405 | elf_x86_64_finish_local_dynamic_symbol, |
c25bc9fc L |
4406 | info); |
4407 | ||
b34976b6 | 4408 | return TRUE; |
8d88c4ca NC |
4409 | } |
4410 | ||
4c45e5c9 JJ |
4411 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
4412 | or (bfd_vma) -1 if it should not be included. */ | |
4413 | ||
4414 | static bfd_vma | |
351f65ca L |
4415 | elf_x86_64_plt_sym_val (bfd_vma i, const asection *plt, |
4416 | const arelent *rel ATTRIBUTE_UNUSED) | |
4c45e5c9 JJ |
4417 | { |
4418 | return plt->vma + (i + 1) * PLT_ENTRY_SIZE; | |
4419 | } | |
8df9fc9d | 4420 | |
d2b2c203 DJ |
4421 | /* Handle an x86-64 specific section when reading an object file. This |
4422 | is called when elfcode.h finds a section with an unknown type. */ | |
4423 | ||
4424 | static bfd_boolean | |
351f65ca | 4425 | elf_x86_64_section_from_shdr (bfd *abfd, |
6dc132d9 L |
4426 | Elf_Internal_Shdr *hdr, |
4427 | const char *name, | |
4428 | int shindex) | |
d2b2c203 DJ |
4429 | { |
4430 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
4431 | return FALSE; | |
4432 | ||
6dc132d9 | 4433 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
4434 | return FALSE; |
4435 | ||
4436 | return TRUE; | |
4437 | } | |
4438 | ||
3b22753a L |
4439 | /* Hook called by the linker routine which adds symbols from an object |
4440 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
4441 | of .bss. */ | |
4442 | ||
4443 | static bfd_boolean | |
351f65ca L |
4444 | elf_x86_64_add_symbol_hook (bfd *abfd, |
4445 | struct bfd_link_info *info, | |
4446 | Elf_Internal_Sym *sym, | |
4447 | const char **namep ATTRIBUTE_UNUSED, | |
4448 | flagword *flagsp ATTRIBUTE_UNUSED, | |
4449 | asection **secp, | |
4450 | bfd_vma *valp) | |
3b22753a L |
4451 | { |
4452 | asection *lcomm; | |
4453 | ||
4454 | switch (sym->st_shndx) | |
4455 | { | |
4456 | case SHN_X86_64_LCOMMON: | |
4457 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
4458 | if (lcomm == NULL) | |
4459 | { | |
4460 | lcomm = bfd_make_section_with_flags (abfd, | |
4461 | "LARGE_COMMON", | |
4462 | (SEC_ALLOC | |
4463 | | SEC_IS_COMMON | |
4464 | | SEC_LINKER_CREATED)); | |
4465 | if (lcomm == NULL) | |
4466 | return FALSE; | |
4467 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
4468 | } | |
4469 | *secp = lcomm; | |
4470 | *valp = sym->st_size; | |
c35bdf6e | 4471 | return TRUE; |
3b22753a | 4472 | } |
d8045f23 | 4473 | |
c16153ae | 4474 | if ((abfd->flags & DYNAMIC) == 0 |
f64b2e8d NC |
4475 | && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC |
4476 | || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)) | |
4477 | elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE; | |
d8045f23 | 4478 | |
3b22753a L |
4479 | return TRUE; |
4480 | } | |
4481 | ||
4482 | ||
4483 | /* Given a BFD section, try to locate the corresponding ELF section | |
4484 | index. */ | |
4485 | ||
4486 | static bfd_boolean | |
351f65ca L |
4487 | elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
4488 | asection *sec, int *index_return) | |
3b22753a L |
4489 | { |
4490 | if (sec == &_bfd_elf_large_com_section) | |
4491 | { | |
91d6fa6a | 4492 | *index_return = SHN_X86_64_LCOMMON; |
3b22753a L |
4493 | return TRUE; |
4494 | } | |
4495 | return FALSE; | |
4496 | } | |
4497 | ||
4498 | /* Process a symbol. */ | |
4499 | ||
4500 | static void | |
351f65ca L |
4501 | elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
4502 | asymbol *asym) | |
3b22753a L |
4503 | { |
4504 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
4505 | ||
4506 | switch (elfsym->internal_elf_sym.st_shndx) | |
4507 | { | |
4508 | case SHN_X86_64_LCOMMON: | |
4509 | asym->section = &_bfd_elf_large_com_section; | |
4510 | asym->value = elfsym->internal_elf_sym.st_size; | |
4511 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
4512 | asym->flags &= ~BSF_GLOBAL; | |
4513 | break; | |
4514 | } | |
4515 | } | |
4516 | ||
4517 | static bfd_boolean | |
351f65ca | 4518 | elf_x86_64_common_definition (Elf_Internal_Sym *sym) |
3b22753a L |
4519 | { |
4520 | return (sym->st_shndx == SHN_COMMON | |
4521 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
4522 | } | |
4523 | ||
4524 | static unsigned int | |
351f65ca | 4525 | elf_x86_64_common_section_index (asection *sec) |
3b22753a L |
4526 | { |
4527 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
4528 | return SHN_COMMON; | |
4529 | else | |
4530 | return SHN_X86_64_LCOMMON; | |
4531 | } | |
4532 | ||
4533 | static asection * | |
351f65ca | 4534 | elf_x86_64_common_section (asection *sec) |
3b22753a L |
4535 | { |
4536 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
4537 | return bfd_com_section_ptr; | |
4538 | else | |
4539 | return &_bfd_elf_large_com_section; | |
4540 | } | |
4541 | ||
4542 | static bfd_boolean | |
351f65ca L |
4543 | elf_x86_64_merge_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
4544 | struct elf_link_hash_entry **sym_hash ATTRIBUTE_UNUSED, | |
4545 | struct elf_link_hash_entry *h, | |
4546 | Elf_Internal_Sym *sym, | |
4547 | asection **psec, | |
4548 | bfd_vma *pvalue ATTRIBUTE_UNUSED, | |
4549 | unsigned int *pold_alignment ATTRIBUTE_UNUSED, | |
4550 | bfd_boolean *skip ATTRIBUTE_UNUSED, | |
4551 | bfd_boolean *override ATTRIBUTE_UNUSED, | |
4552 | bfd_boolean *type_change_ok ATTRIBUTE_UNUSED, | |
4553 | bfd_boolean *size_change_ok ATTRIBUTE_UNUSED, | |
4554 | bfd_boolean *newdef ATTRIBUTE_UNUSED, | |
4555 | bfd_boolean *newdyn, | |
4556 | bfd_boolean *newdyncommon ATTRIBUTE_UNUSED, | |
4557 | bfd_boolean *newweak ATTRIBUTE_UNUSED, | |
4558 | bfd *abfd ATTRIBUTE_UNUSED, | |
4559 | asection **sec, | |
4560 | bfd_boolean *olddef ATTRIBUTE_UNUSED, | |
4561 | bfd_boolean *olddyn, | |
4562 | bfd_boolean *olddyncommon ATTRIBUTE_UNUSED, | |
4563 | bfd_boolean *oldweak ATTRIBUTE_UNUSED, | |
4564 | bfd *oldbfd, | |
4565 | asection **oldsec) | |
3b22753a L |
4566 | { |
4567 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
4568 | normal common symbol. We turn the large common symbol into a |
4569 | normal one. */ | |
3b22753a L |
4570 | if (!*olddyn |
4571 | && h->root.type == bfd_link_hash_common | |
4572 | && !*newdyn | |
4573 | && bfd_is_com_section (*sec) | |
00492999 | 4574 | && *oldsec != *sec) |
3b22753a | 4575 | { |
00492999 L |
4576 | if (sym->st_shndx == SHN_COMMON |
4577 | && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) != 0) | |
4578 | { | |
4579 | h->root.u.c.p->section | |
4580 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
4581 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
4582 | } | |
4583 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
4584 | && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) == 0) | |
9a2e389a | 4585 | *psec = *sec = bfd_com_section_ptr; |
3b22753a L |
4586 | } |
4587 | ||
4588 | return TRUE; | |
4589 | } | |
4590 | ||
4591 | static int | |
351f65ca L |
4592 | elf_x86_64_additional_program_headers (bfd *abfd, |
4593 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
4594 | { |
4595 | asection *s; | |
9a2e389a | 4596 | int count = 0; |
3b22753a L |
4597 | |
4598 | /* Check to see if we need a large readonly segment. */ | |
4599 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
4600 | if (s && (s->flags & SEC_LOAD)) | |
4601 | count++; | |
4602 | ||
4603 | /* Check to see if we need a large data segment. Since .lbss sections | |
4604 | is placed right after the .bss section, there should be no need for | |
4605 | a large data segment just because of .lbss. */ | |
4606 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
4607 | if (s && (s->flags & SEC_LOAD)) | |
4608 | count++; | |
4609 | ||
4610 | return count; | |
4611 | } | |
4612 | ||
fdc90cb4 JJ |
4613 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
4614 | ||
4615 | static bfd_boolean | |
351f65ca | 4616 | elf_x86_64_hash_symbol (struct elf_link_hash_entry *h) |
fdc90cb4 JJ |
4617 | { |
4618 | if (h->plt.offset != (bfd_vma) -1 | |
4619 | && !h->def_regular | |
4620 | && !h->pointer_equality_needed) | |
4621 | return FALSE; | |
4622 | ||
4623 | return _bfd_elf_hash_symbol (h); | |
4624 | } | |
4625 | ||
c543bf9a L |
4626 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */ |
4627 | ||
4628 | static bfd_boolean | |
4629 | elf_x86_64_relocs_compatible (const bfd_target *input, | |
4630 | const bfd_target *output) | |
4631 | { | |
4632 | return ((xvec_get_elf_backend_data (input)->s->elfclass | |
4633 | == xvec_get_elf_backend_data (output)->s->elfclass) | |
4634 | && _bfd_elf_relocs_compatible (input, output)); | |
4635 | } | |
4636 | ||
9a2e389a | 4637 | static const struct bfd_elf_special_section |
351f65ca | 4638 | elf_x86_64_special_sections[]= |
3b22753a | 4639 | { |
0112cd26 NC |
4640 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
4641 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
4642 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
4643 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
4644 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
4645 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
4646 | { NULL, 0, 0, 0, 0 } | |
3b22753a L |
4647 | }; |
4648 | ||
70256ad8 AJ |
4649 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec |
4650 | #define TARGET_LITTLE_NAME "elf64-x86-64" | |
4651 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 4652 | #define ELF_TARGET_ID X86_64_ELF_DATA |
70256ad8 | 4653 | #define ELF_MACHINE_CODE EM_X86_64 |
f7661549 | 4654 | #define ELF_MAXPAGESIZE 0x200000 |
2043964e | 4655 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 4656 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
4657 | |
4658 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 4659 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
4660 | #define elf_backend_want_got_plt 1 |
4661 | #define elf_backend_plt_readonly 1 | |
4662 | #define elf_backend_want_plt_sym 0 | |
4663 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 4664 | #define elf_backend_rela_normal 1 |
70256ad8 | 4665 | |
351f65ca | 4666 | #define elf_info_to_howto elf_x86_64_info_to_howto |
70256ad8 | 4667 | |
70256ad8 | 4668 | #define bfd_elf64_bfd_link_hash_table_create \ |
351f65ca | 4669 | elf_x86_64_link_hash_table_create |
c25bc9fc | 4670 | #define bfd_elf64_bfd_link_hash_table_free \ |
351f65ca L |
4671 | elf_x86_64_link_hash_table_free |
4672 | #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup | |
157090f7 | 4673 | #define bfd_elf64_bfd_reloc_name_lookup \ |
351f65ca | 4674 | elf_x86_64_reloc_name_lookup |
70256ad8 | 4675 | |
351f65ca | 4676 | #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol |
c543bf9a | 4677 | #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible |
351f65ca L |
4678 | #define elf_backend_check_relocs elf_x86_64_check_relocs |
4679 | #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol | |
4680 | #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections | |
4681 | #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections | |
4682 | #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol | |
4683 | #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook | |
4684 | #define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook | |
4685 | #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus | |
4686 | #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo | |
4687 | #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class | |
4688 | #define elf_backend_relocate_section elf_x86_64_relocate_section | |
4689 | #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections | |
4690 | #define elf_backend_always_size_sections elf_x86_64_always_size_sections | |
74541ad4 | 4691 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
351f65ca | 4692 | #define elf_backend_plt_sym_val elf_x86_64_plt_sym_val |
407443a3 | 4693 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
351f65ca | 4694 | #define bfd_elf64_mkobject elf_x86_64_mkobject |
8d88c4ca | 4695 | |
d2b2c203 | 4696 | #define elf_backend_section_from_shdr \ |
351f65ca | 4697 | elf_x86_64_section_from_shdr |
d2b2c203 | 4698 | |
3b22753a | 4699 | #define elf_backend_section_from_bfd_section \ |
351f65ca | 4700 | elf_x86_64_elf_section_from_bfd_section |
3b22753a | 4701 | #define elf_backend_add_symbol_hook \ |
351f65ca | 4702 | elf_x86_64_add_symbol_hook |
3b22753a | 4703 | #define elf_backend_symbol_processing \ |
351f65ca | 4704 | elf_x86_64_symbol_processing |
3b22753a | 4705 | #define elf_backend_common_section_index \ |
351f65ca | 4706 | elf_x86_64_common_section_index |
3b22753a | 4707 | #define elf_backend_common_section \ |
351f65ca | 4708 | elf_x86_64_common_section |
3b22753a | 4709 | #define elf_backend_common_definition \ |
351f65ca | 4710 | elf_x86_64_common_definition |
3b22753a | 4711 | #define elf_backend_merge_symbol \ |
351f65ca | 4712 | elf_x86_64_merge_symbol |
3b22753a | 4713 | #define elf_backend_special_sections \ |
351f65ca | 4714 | elf_x86_64_special_sections |
3b22753a | 4715 | #define elf_backend_additional_program_headers \ |
351f65ca | 4716 | elf_x86_64_additional_program_headers |
fdc90cb4 | 4717 | #define elf_backend_hash_symbol \ |
351f65ca | 4718 | elf_x86_64_hash_symbol |
3b22753a | 4719 | |
d8045f23 NC |
4720 | #undef elf_backend_post_process_headers |
4721 | #define elf_backend_post_process_headers _bfd_elf_set_osabi | |
4722 | ||
8d88c4ca | 4723 | #include "elf64-target.h" |
9d7cbccd NC |
4724 | |
4725 | /* FreeBSD support. */ | |
4726 | ||
4727 | #undef TARGET_LITTLE_SYM | |
4728 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_freebsd_vec | |
4729 | #undef TARGET_LITTLE_NAME | |
4730 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" | |
4731 | ||
d1036acb L |
4732 | #undef ELF_OSABI |
4733 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 4734 | |
9d7cbccd NC |
4735 | #undef elf64_bed |
4736 | #define elf64_bed elf64_x86_64_fbsd_bed | |
4737 | ||
4738 | #include "elf64-target.h" | |
8a9036a4 | 4739 | |
a6cc6b3b RO |
4740 | /* Solaris 2 support. */ |
4741 | ||
4742 | #undef TARGET_LITTLE_SYM | |
4743 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_sol2_vec | |
4744 | #undef TARGET_LITTLE_NAME | |
4745 | #define TARGET_LITTLE_NAME "elf64-x86-64-sol2" | |
4746 | ||
4747 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE | |
4748 | objects won't be recognized. */ | |
4749 | #undef ELF_OSABI | |
4750 | ||
4751 | #undef elf64_bed | |
4752 | #define elf64_bed elf64_x86_64_sol2_bed | |
4753 | ||
7dc98aea RO |
4754 | /* The 64-bit static TLS arena size is rounded to the nearest 16-byte |
4755 | boundary. */ | |
4756 | #undef elf_backend_static_tls_alignment | |
4757 | #define elf_backend_static_tls_alignment 16 | |
4758 | ||
a6cc6b3b RO |
4759 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
4760 | ||
4761 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
4762 | File, p.63. */ | |
4763 | #undef elf_backend_want_plt_sym | |
4764 | #define elf_backend_want_plt_sym 1 | |
4765 | ||
4766 | #include "elf64-target.h" | |
4767 | ||
8a9036a4 L |
4768 | /* Intel L1OM support. */ |
4769 | ||
4770 | static bfd_boolean | |
4771 | elf64_l1om_elf_object_p (bfd *abfd) | |
4772 | { | |
4773 | /* Set the right machine number for an L1OM elf64 file. */ | |
4774 | bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om); | |
4775 | return TRUE; | |
4776 | } | |
4777 | ||
4778 | #undef TARGET_LITTLE_SYM | |
4779 | #define TARGET_LITTLE_SYM bfd_elf64_l1om_vec | |
4780 | #undef TARGET_LITTLE_NAME | |
4781 | #define TARGET_LITTLE_NAME "elf64-l1om" | |
4782 | #undef ELF_ARCH | |
4783 | #define ELF_ARCH bfd_arch_l1om | |
4784 | ||
4785 | #undef ELF_MACHINE_CODE | |
4786 | #define ELF_MACHINE_CODE EM_L1OM | |
4787 | ||
4788 | #undef ELF_OSABI | |
4789 | ||
4790 | #undef elf64_bed | |
4791 | #define elf64_bed elf64_l1om_bed | |
4792 | ||
4793 | #undef elf_backend_object_p | |
4794 | #define elf_backend_object_p elf64_l1om_elf_object_p | |
4795 | ||
4796 | #undef elf_backend_post_process_headers | |
7dc98aea | 4797 | #undef elf_backend_static_tls_alignment |
8a9036a4 | 4798 | |
1a0c107f L |
4799 | #undef elf_backend_want_plt_sym |
4800 | #define elf_backend_want_plt_sym 0 | |
4801 | ||
8a9036a4 L |
4802 | #include "elf64-target.h" |
4803 | ||
4804 | /* FreeBSD L1OM support. */ | |
4805 | ||
4806 | #undef TARGET_LITTLE_SYM | |
4807 | #define TARGET_LITTLE_SYM bfd_elf64_l1om_freebsd_vec | |
4808 | #undef TARGET_LITTLE_NAME | |
4809 | #define TARGET_LITTLE_NAME "elf64-l1om-freebsd" | |
4810 | ||
4811 | #undef ELF_OSABI | |
4812 | #define ELF_OSABI ELFOSABI_FREEBSD | |
4813 | ||
4814 | #undef elf64_bed | |
4815 | #define elf64_bed elf64_l1om_fbsd_bed | |
4816 | ||
4817 | #undef elf_backend_post_process_headers | |
4818 | #define elf_backend_post_process_headers _bfd_elf_set_osabi | |
4819 | ||
4820 | #include "elf64-target.h" | |
351f65ca L |
4821 | |
4822 | /* 32bit x86-64 support. */ | |
4823 | ||
4824 | static bfd_boolean | |
4825 | elf32_x86_64_elf_object_p (bfd *abfd) | |
4826 | { | |
4827 | /* Set the right machine number for an x86-64 elf32 file. */ | |
4828 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32); | |
4829 | return TRUE; | |
4830 | } | |
4831 | ||
4832 | #undef TARGET_LITTLE_SYM | |
4833 | #define TARGET_LITTLE_SYM bfd_elf32_x86_64_vec | |
4834 | #undef TARGET_LITTLE_NAME | |
4835 | #define TARGET_LITTLE_NAME "elf32-x86-64" | |
4836 | ||
4837 | #undef ELF_ARCH | |
4838 | #define ELF_ARCH bfd_arch_i386 | |
4839 | ||
4840 | #undef ELF_MACHINE_CODE | |
4841 | #define ELF_MACHINE_CODE EM_X86_64 | |
4842 | ||
4843 | #define bfd_elf32_bfd_link_hash_table_create \ | |
4844 | elf_x86_64_link_hash_table_create | |
4845 | #define bfd_elf32_bfd_link_hash_table_free \ | |
4846 | elf_x86_64_link_hash_table_free | |
4847 | #define bfd_elf32_bfd_reloc_type_lookup \ | |
4848 | elf_x86_64_reloc_type_lookup | |
4849 | #define bfd_elf32_bfd_reloc_name_lookup \ | |
4850 | elf_x86_64_reloc_name_lookup | |
4851 | #define bfd_elf32_mkobject \ | |
4852 | elf_x86_64_mkobject | |
4853 | ||
4854 | #undef ELF_OSABI | |
4855 | ||
4856 | #undef elf_backend_post_process_headers | |
4857 | ||
4858 | #undef elf_backend_object_p | |
4859 | #define elf_backend_object_p \ | |
4860 | elf32_x86_64_elf_object_p | |
4861 | ||
4862 | #undef elf_backend_bfd_from_remote_memory | |
4863 | #define elf_backend_bfd_from_remote_memory \ | |
4864 | _bfd_elf32_bfd_from_remote_memory | |
4865 | ||
4866 | #undef elf_backend_size_info | |
4867 | #define elf_backend_size_info \ | |
4868 | _bfd_elf32_size_info | |
4869 | ||
4870 | #include "elf32-target.h" |